初一下【300道不重复的题目,
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初一下【300道不重复的题目,
不等式或者2元一次方程(再加几个3元一次方程)【不等式要2个算式组成一道;【2、3元一次方程至少有2个算式组成一道,最多3个算式组成一道.【每道题目用大括号括好【300道哦~
给的好的最少给100悬赏【不包括采纳送的30还有100
如果很好的话送最多1000
先给50,
不等式或者2元一次方程(再加几个3元一次方程)【不等式要2个算式组成一道;【2、3元一次方程至少有2个算式组成一道,最多3个算式组成一道.【每道题目用大括号括好【300道哦~
给的好的最少给100悬赏【不包括采纳送的30还有100
如果很好的话送最多1000
先给50,
a^3-2b^3+ab(2a-b)
2.(x^2+y^2)^2-4y(x^2+y^2)+4y^2
3.(x^2+2x)^2+3(x^2+2x)+x^2+2x+3
4.(a+1)(a+2)+(2a+1)(a-2)-12
5.x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2
6.3(a+2)^2+28(a+2)-20
7.(a+b)^2-(b-c)^2+a^2-c^2
8.x(x+1)(x^2+x-1)-2
9.9x^2(x-1)^2-3(x^2-x)-56
10a(a-b)+(a-b)^2
11.-ab(a-b)^+a(b-a)^2
12.3(x+2)-2x=5-4x
13.5(x+2a)-a=2(b-2x)+4a
14.已知1的三次方+2的三次方+3的三次方+……+15的三次方=14400,求2的三次方+4的三次方+6的三次方+……+30的三次方的值
15..〔1.4- (-3.6+5.2) -4.3〕-(-1.5)
16.5x-2(x-1)=17
17.2-2(2x-4)=-(x-7)
18.12-2(2x-4)=-x-7
19.12-2(2x-4)=-(x-7)
20.7(2x-1)-3(4x-1)=4(3x+2)-1;
21.(5y+1)+ (1-y)= (9y+1)+ (1-3y);
22.20%+(1-20%)(320-x)=320×40%
23.23+(-73)
24.(-84)+(-49)
25.7+(-2.04)
26.4.23+(-7.57)
27.(-7/3)+(-7/6)
28.9/4+(-3/2)
29.3.75+(2.25)+5/4
30.-3.75+(+5/4)+(-1.5)
31.(17/4)+(-10/3)+(+13/3)+(11/3) (2)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)
32.已知:X=+17(3/4),Y=-9(5/11),Z=-2.25,
23+(-73)+(-50) (-84)+(-49)+30 65+(-52)
:(X的4次方)的2次方+(X的2次方)的4次方-X(X的2次方)的2次方*X的3次方-(-X)的3次方*(-X的2次方)的2次方*(-X)
6*2(X*M)=65(1)7(2x-1)-3(4x-1)=4(3x+2)-1; (2) (5y+1)+ (1-y)= (9y+1)+ (1-3y);
(3)[ (1/4x-3)-4 ]=x+2; (4)20%+(1-20%)(320-x)=320×40%
(5)2(x-2)+2=x+1 (6)2(x-2)-3(4x-1)=9(1-x)
(7)11x+64-2x=100-9x (8)15-(8-5x)=7x+(4-3x)
(9)3(x-7)-2[9-4(2-x)]=22 (10)3/2[2/3(1/4x-1)-2]-x=2
(11)2x-10.3x=15 (12)0.52x-(1-0.52)x=80
(13)x/2+3x/2=7 (14)3x+7=32-2x
(15)3x+5(138-x)=540 (16)3x-7(x-1)=3-2(x+3)
(17) 18x+3x-3=18-2(2x-1) (18)3(20-y)=6y-4(y-11)
(19)-(x/4-1)=5 (20)3[4(5y-1)-8]=6 (21)
; (22)(x+1)-3(x-1)=1-3x;(23)(x-2)-2(4x-1)=3(1-x).;
1)(-9)-(-13)+(-20)+(-2)
(2) 3+13-(-7)/6
(3) (-2)-8-14-13
(4) (-7)*(-1)/7+8
(5) (-11)*4-(-18)/18
(6) 4+(-11)-1/(-3)
(7) (-17)-6-16/(-18)
(8) 5/7+(-1)-(-8)
(9) (-1)*(-1)+15+1
(10) 3-(-5)*3/(-15)
(11) 6*(-14)-(-14)+(-13)
(12) (-15)*(-13)-(-17)-(-4)
(13) (-20)/13/(-7)+11
(14) 8+(-1)/7+(-4)
(15) (-13)-(-9)*16*(-12)
(16) (-1)+4*19+(-2)
(17) (-17)*(-9)-20+(-6)
(18) (-5)/12-(-16)*(-15)
(19) (-3)-13*(-5)*13
(20) 5+(-7)+17-10
(21) (-10)-(-16)-13*(-16)
(22) (-14)+4-19-12
(23) 5*13/14/(-10)
(24) 3*1*17/(-10)
(25) 6+(-12)+15-(-15)
(26) 15/9/13+(-7)
(27) 2/(-10)*1-(-8)
(28) 11/(-19)+(-14)-5
(29) 19-16+18/(-11)
(30) (-1)/19+(-5)+1
(31) (-5)+19/10*(-5)
(32) 11/(-17)*(-13)*12
(33) (-8)+(-10)/8*17
(34) 7-(-12)/(-1)+(-12)
(35) 12+12-19+20
(36) (-13)*(-11)*20+(-4)
(37) 17/(-2)-2*(-19)
(38) 1-12*(-16)+(-9)
(39) 13*(-14)-15/20
(40) (-15)*(-13)-6/(-9)
(41) 15*(-1)/12+7
(42) (-13)+(-16)+(-14)-(-6)
(43) 14*12*(-20)*(-13)
(44) 17-9-20+(-10)
(45) 12/(-14)+(-14)+(-2)
(46) (-15)-12/(-17)-(-3)
(47) 6-3/9/(-8)
(48) (-20)*(-15)*10*(-4)
(49) 7/(-2)*(-3)/(-14)
(50) 13/2*18*(-7)
(51) 13*5+6+3
(52) (-15)/5/3+(-20)
(53) 19*4+17-4
(54) (-11)-(-6)*(-4)*(-9)
(55) (-16)+16-(-8)*(-13)
(56) 16/(-1)/(-10)/(-20)
(57) (-1)-(-9)-9/(-19)
(58) 13*20*(-13)*4
(59) 11*(-6)-3+18
(60) (-20)+(-12)+(-1)+(-12)
(61) (-19)-3*(-13)*4 3(y-2x)+4y=2x+19 2x+5y=29
2. 3m+2n=20 4m-5n=19
3. (2x+3y)÷4+(2x-3y)÷3=6 ( 2x+3y)÷3+(2x-3y)÷2=8
4. (2x+3y)÷4+(2x-3y)÷3=12.5 5÷(x+8)=1÷(y-2)
5 2x+3y+19=0 x+15-1=0
6 (x+y)/20=30 (x-y)/20=20
7.6x+8>3x+8
8.3x-7≥4x-4
9.2x-19<7x+31
10.2x-3x+1<6
11.3x-2(9-x)>3(7+2x)-(11-6x)
12.2(3x-1)-3(4x+5)≤x-4(x-7)
13.2(x-1)-x>3(x-1)-3x-5
14.3[y-2(y-7)]≤4y
15.15-(7+5x)≤2x+(5-3x)
16.20x-3≤5x+(x-5)
17.7x-2(x-3)<16
18.3(2x-1)<4(x-1)
19.5-x(x+3)>2-x(x-1)
20.3-4[1-3(2-x)] >59
21.4x-10<15x-(8x-2)
22.3(6+x)>6(X+3)
23.2/3(x+6-9)<5(-x+9)x-y=2
x+y=11,xy=30
x+y=13,xX^2-X-6=0 2X^2-3X-2=0
-3X^2+6X=2
4X^2-4X+1=0
X^2-2X+3=0
-X^2-2X+8=0
X^2-X-2=4
2X^2-3X+1=0
-3X^2+4X+4=0
4X^2-11X-3=3
x^2-2x-3=0
4x^2-1=0
5x^2-3x+2=0
-x^2-2x+8=0
-2x2+x+3=0
2x^2+3x-9=0
x^2-9=0
4x^2-10x-6=0
5x^2-8x-4=0
3x^2+4x-4=0
6x^2+7x-5=0
x^2-8x+12=0
2x^2-6x+3=0
2x^2+9x-5=0
3x^2-16x+5=0
2x^2-11x+5=0
4x^2-16x+7=0
10x^2-9x-7=0
2x^2-13x-7=0
2x^2-3x-2=0
-2x^2+3x-1=0
2x^2-17x-9=0
2x^2-x-6=0
12x^2+16x-3=0
6x^2-13x+2=0
3x^2-7x+2=0
5x^2-11x+2=0
2x^2-9x+9=0
2x^2+3x-9=0
x^2+2x-3=0
x^2-6x+5=0
x^2-3x+2=0
x^2-12x+32=0
x^2+6x-16=0
3x^2-12x-15=0
2x^2-11x-21=0
方程的.
1,x-y=2
xy=15
2,x+y=6 y=42
5,x+y=11,x-y=1
6,x+y=12,xy=35
7,x+y=5,xy=6
8,x-y=5,xy=36
9,x+y=10,xy=25
10,x+y=17,y-x=1
11,xy=2,x-y=1
12,x+y=3,xy=913,x+y=12,xy=11
14,x-y=8,xy=9
15,x+y=4,x-y=2
16,x+y=3,xy=0
17,x-y=5,xy=6
18,y-x=3,xy=28
19,y-x=2,xy=24
20,x+y=9,x-y=1,
21. 66x+17y=3967 25x+y=1200
22. 18x+23y=2303 74x-y=1998
23. 44x+90y=7796 44x+y=3476
(4) 76x-66y=4082 30x-y=2940
(5) 67x+54y=8546 71x-y=5680
化简求值
^代表平方 1.已知|a+3|+(b-1)^=0,求3a^-2ab+b^的值.
2.已知(a-1)^+4(b+2)+|c+1|=0,求(a^-ac+c^)-2(a^+bc-2c^)的值.
3.(3x^-2y^-3xy)-(2x^-3y^+xy),其中x^+y^=2,xy=-1.
4.(-a^-ab+b^)-(-a^+2ab+b^),其中a=-1/15,b=10.
5.已知:|a+1/2|+(b-3)^=0,求代数式[(2a+b)^+(2a+b)(b-2a)-6b]\(2b)的值. 6.10a(5乘以a的平方-b)-2a(5b+25乘以a的平方)-3ab,其中a=1,b=1/23. 7.1/3x^3-2x^2+2/3x^3+3x^2+5x-4x+7,(x=2) 先化简,再求值.
8.5abc-{2a²b[3abc-(4ab²-a²b)]-2ab²}其中a=-2,b=3,c=-1/4.
9.已知a²+a-1=0,求代数式a³+2a²+5的值.
10.(a+2)的二次方-(a-1)(a+1),其中a=3.25 先化简再求值
11.(X-1)的二次方+(x+3)(x-3)+(x-3)(x-1),其中X的二次方-2x=2
12.已知:a+b=12,a的平方+b的平方=74 求ab的值
13.先化简,再求值 (4x-3y)的平方-(3x-2y)(3x+2y),其中x=2,y=1
14.化简求值:(1 + a - 5a)-(- a +2a ),其中a= - 3
15.已知3分之a=4分之b=5分之c,求代数式2b-a分之2a+b+c的值
16.(x-3)2+|y+2|=0则yx的值为( )
17.设a,b,c为有理数,且|a|+a=0,|ab|=ab,|c|-c=0 求式子|b|-|a+b|-|c-b|+|a-c|的值
18.9x+6x^2-3(x-2/3x^2),其中x=-2 9x+6x^2-3x+11/3x^2=6x+29/3x^2=6*(-2)+29/3*(-2)=-12-58/3=-94/3
19.1/4(-4x^2+2x-8)-(1/2x-1),其中x=1/2 -x^2+1/2x-2-1/2x+1=-1/2^2+1/4-2-1/4+1=1/4-1=-3/4
20.(5a^2-3b^2)+(a^2+b^2)-(5a^2+3b^2),其中a=-1,b=1 5a^2-3b^2+a^2+b^2-5a^2-3b^2=5-3+1+1-5-3=-6+2=-4
21.2(a^2b+ab^2)-2(a^2b-1)-2ab^2-2,其中a=-2,b=2 2a^2*2b+2ab^2-2a^2*2b*2-2ab^2-2=8*4-4*4-2=-18X^2-X-6=0
2X^2-3X-2=0
-3X^2+6X=2
4X^2-4X+1=0
X^2-2X+3=0
-X^2-2X+8=0
X^2-X-2=4
2X^2-3X+1=0
-3X^2+4X+4=0
4X^2-11X-3=3
x^2-2x-3=0
4x^2-1=0
5x^2-3x+2=0
-x^2-2x+8=0
-2x2+x+3=0
2x^2+3x-9=0
x^2-9=0
4x^2-10x-6=0
5x^2-8x-4=0
3x^2+4x-4=0
6x^2+7x-5=0
x^2-8x+12=0
2x^2-6x+3=0
2x^2+9x-5=0
3x^2-16x+5=0
2x^2-11x+5=0
4x^2-16x+7=0
10x^2-9x-7=0
2x^2-13x-7=0
2x^2-3x-2=0
-2x^2+3x-1=0
2x^2-17x-9=0
2x^2-x-6=0
12x^2+16x-3=0
6x^2-13x+2=0
3x^2-7x+2=0
5x^2-11x+2=0
2x^2-9x+9=0
2x^2+3x-9=0
x^2+2x-3=0
x^2-6x+5=0
x^2-3x+2=0
x^2-12x+32=0
x^2+6x-16=0
3x^2-12x-15=0
2x^2-11x-21=0
{3x-2y=12 2、{2x+y=5
{x+2y=14 {3x+2y=8
3、{2x+3y= -1 4、{x+4y=8
{4x-9y=8 {x-4y=10
5、{4x+3y=5 6、{3x+5y=88
{2x-y=-5 {2x-y=1 2x+17=35
3x-64=11
12+8x=52
0.8x-4.2=2.2
2x+5=10
3x-15=75
4x+4o=320
3x+77=122
5x-1.6=0.6
6x-4=20
10x-0.6=2.4
500-12x=1401) 66x+17y=3967
25x+y=1200
(2) 18x+23y=2303
74x-y=1998
(3) 44x+90y=7796
44x+y=3476
(4) 76x-66y=4082
30x-y=2940
(5) 67x+54y=8546
71x-y=5680
(6) 42x-95y=-1410
21x-y=1575
(7) 47x-40y=853
34x-y=2006
答案:x=59 y=48
(8) 19x-32y=-1786
75x+y=4950
(9) 97x+24y=7202
58x-y=2900
(10) 42x+85y=6362
63x-y=1638
(11) 85x-92y=-2518
27x-y=486
(12) 79x+40y=2419
56x-y=1176
(13) 80x-87y=2156
22x-y=880
(14) 32x+62y=5134
57x+y=2850
(15) 83x-49y=82
59x+y=2183
(16) 91x+70y=5845
95x-y=4275
(17) 29x+44y=5281
88x-y=3608
(18) 25x-95y=-4355
40x-y=2000
(19) 54x+68y=3284
78x+y=1404
(20) 70x+13y=3520
52x+y=2132
(21) 48x-54y=-3186
24x+y=1080
(22) 36x+77y=7619
47x-y=799
(23) 13x-42y=-2717
31x-y=1333
(24) 28x+28y=3332
52x-y=4628
(25) 62x-98y=-2564
46x-y=2024
(26) 79x-76y=-4388
26x-y=832
(27) 63x-40y=-821
42x-y=546
(28) 69x-96y=-1209
42x+y=3822
(29) 85x+67y=7338
11x+y=308
(30) 78x+74y=12928
14x+y=1218
(31) 39x+42y=5331
59x-y=5841
(32) 29x+18y=1916
58x+y=2320
(33) 40x+31y=6043
45x-y=3555
(34) 47x+50y=8598
45x+y=3780
(35) 45x-30y=-1455
29x-y=725
(36) 11x-43y=-1361
47x+y=799
(37) 33x+59y=3254
94x+y=1034
(38) 89x-74y=-2735
68x+y=1020
(39) 94x+71y=7517
78x+y=3822
这里大概有300道题了,望采纳,拜托!
2.(x^2+y^2)^2-4y(x^2+y^2)+4y^2
3.(x^2+2x)^2+3(x^2+2x)+x^2+2x+3
4.(a+1)(a+2)+(2a+1)(a-2)-12
5.x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2
6.3(a+2)^2+28(a+2)-20
7.(a+b)^2-(b-c)^2+a^2-c^2
8.x(x+1)(x^2+x-1)-2
9.9x^2(x-1)^2-3(x^2-x)-56
10a(a-b)+(a-b)^2
11.-ab(a-b)^+a(b-a)^2
12.3(x+2)-2x=5-4x
13.5(x+2a)-a=2(b-2x)+4a
14.已知1的三次方+2的三次方+3的三次方+……+15的三次方=14400,求2的三次方+4的三次方+6的三次方+……+30的三次方的值
15..〔1.4- (-3.6+5.2) -4.3〕-(-1.5)
16.5x-2(x-1)=17
17.2-2(2x-4)=-(x-7)
18.12-2(2x-4)=-x-7
19.12-2(2x-4)=-(x-7)
20.7(2x-1)-3(4x-1)=4(3x+2)-1;
21.(5y+1)+ (1-y)= (9y+1)+ (1-3y);
22.20%+(1-20%)(320-x)=320×40%
23.23+(-73)
24.(-84)+(-49)
25.7+(-2.04)
26.4.23+(-7.57)
27.(-7/3)+(-7/6)
28.9/4+(-3/2)
29.3.75+(2.25)+5/4
30.-3.75+(+5/4)+(-1.5)
31.(17/4)+(-10/3)+(+13/3)+(11/3) (2)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)
32.已知:X=+17(3/4),Y=-9(5/11),Z=-2.25,
23+(-73)+(-50) (-84)+(-49)+30 65+(-52)
:(X的4次方)的2次方+(X的2次方)的4次方-X(X的2次方)的2次方*X的3次方-(-X)的3次方*(-X的2次方)的2次方*(-X)
6*2(X*M)=65(1)7(2x-1)-3(4x-1)=4(3x+2)-1; (2) (5y+1)+ (1-y)= (9y+1)+ (1-3y);
(3)[ (1/4x-3)-4 ]=x+2; (4)20%+(1-20%)(320-x)=320×40%
(5)2(x-2)+2=x+1 (6)2(x-2)-3(4x-1)=9(1-x)
(7)11x+64-2x=100-9x (8)15-(8-5x)=7x+(4-3x)
(9)3(x-7)-2[9-4(2-x)]=22 (10)3/2[2/3(1/4x-1)-2]-x=2
(11)2x-10.3x=15 (12)0.52x-(1-0.52)x=80
(13)x/2+3x/2=7 (14)3x+7=32-2x
(15)3x+5(138-x)=540 (16)3x-7(x-1)=3-2(x+3)
(17) 18x+3x-3=18-2(2x-1) (18)3(20-y)=6y-4(y-11)
(19)-(x/4-1)=5 (20)3[4(5y-1)-8]=6 (21)
; (22)(x+1)-3(x-1)=1-3x;(23)(x-2)-2(4x-1)=3(1-x).;
1)(-9)-(-13)+(-20)+(-2)
(2) 3+13-(-7)/6
(3) (-2)-8-14-13
(4) (-7)*(-1)/7+8
(5) (-11)*4-(-18)/18
(6) 4+(-11)-1/(-3)
(7) (-17)-6-16/(-18)
(8) 5/7+(-1)-(-8)
(9) (-1)*(-1)+15+1
(10) 3-(-5)*3/(-15)
(11) 6*(-14)-(-14)+(-13)
(12) (-15)*(-13)-(-17)-(-4)
(13) (-20)/13/(-7)+11
(14) 8+(-1)/7+(-4)
(15) (-13)-(-9)*16*(-12)
(16) (-1)+4*19+(-2)
(17) (-17)*(-9)-20+(-6)
(18) (-5)/12-(-16)*(-15)
(19) (-3)-13*(-5)*13
(20) 5+(-7)+17-10
(21) (-10)-(-16)-13*(-16)
(22) (-14)+4-19-12
(23) 5*13/14/(-10)
(24) 3*1*17/(-10)
(25) 6+(-12)+15-(-15)
(26) 15/9/13+(-7)
(27) 2/(-10)*1-(-8)
(28) 11/(-19)+(-14)-5
(29) 19-16+18/(-11)
(30) (-1)/19+(-5)+1
(31) (-5)+19/10*(-5)
(32) 11/(-17)*(-13)*12
(33) (-8)+(-10)/8*17
(34) 7-(-12)/(-1)+(-12)
(35) 12+12-19+20
(36) (-13)*(-11)*20+(-4)
(37) 17/(-2)-2*(-19)
(38) 1-12*(-16)+(-9)
(39) 13*(-14)-15/20
(40) (-15)*(-13)-6/(-9)
(41) 15*(-1)/12+7
(42) (-13)+(-16)+(-14)-(-6)
(43) 14*12*(-20)*(-13)
(44) 17-9-20+(-10)
(45) 12/(-14)+(-14)+(-2)
(46) (-15)-12/(-17)-(-3)
(47) 6-3/9/(-8)
(48) (-20)*(-15)*10*(-4)
(49) 7/(-2)*(-3)/(-14)
(50) 13/2*18*(-7)
(51) 13*5+6+3
(52) (-15)/5/3+(-20)
(53) 19*4+17-4
(54) (-11)-(-6)*(-4)*(-9)
(55) (-16)+16-(-8)*(-13)
(56) 16/(-1)/(-10)/(-20)
(57) (-1)-(-9)-9/(-19)
(58) 13*20*(-13)*4
(59) 11*(-6)-3+18
(60) (-20)+(-12)+(-1)+(-12)
(61) (-19)-3*(-13)*4 3(y-2x)+4y=2x+19 2x+5y=29
2. 3m+2n=20 4m-5n=19
3. (2x+3y)÷4+(2x-3y)÷3=6 ( 2x+3y)÷3+(2x-3y)÷2=8
4. (2x+3y)÷4+(2x-3y)÷3=12.5 5÷(x+8)=1÷(y-2)
5 2x+3y+19=0 x+15-1=0
6 (x+y)/20=30 (x-y)/20=20
7.6x+8>3x+8
8.3x-7≥4x-4
9.2x-19<7x+31
10.2x-3x+1<6
11.3x-2(9-x)>3(7+2x)-(11-6x)
12.2(3x-1)-3(4x+5)≤x-4(x-7)
13.2(x-1)-x>3(x-1)-3x-5
14.3[y-2(y-7)]≤4y
15.15-(7+5x)≤2x+(5-3x)
16.20x-3≤5x+(x-5)
17.7x-2(x-3)<16
18.3(2x-1)<4(x-1)
19.5-x(x+3)>2-x(x-1)
20.3-4[1-3(2-x)] >59
21.4x-10<15x-(8x-2)
22.3(6+x)>6(X+3)
23.2/3(x+6-9)<5(-x+9)x-y=2
x+y=11,xy=30
x+y=13,xX^2-X-6=0 2X^2-3X-2=0
-3X^2+6X=2
4X^2-4X+1=0
X^2-2X+3=0
-X^2-2X+8=0
X^2-X-2=4
2X^2-3X+1=0
-3X^2+4X+4=0
4X^2-11X-3=3
x^2-2x-3=0
4x^2-1=0
5x^2-3x+2=0
-x^2-2x+8=0
-2x2+x+3=0
2x^2+3x-9=0
x^2-9=0
4x^2-10x-6=0
5x^2-8x-4=0
3x^2+4x-4=0
6x^2+7x-5=0
x^2-8x+12=0
2x^2-6x+3=0
2x^2+9x-5=0
3x^2-16x+5=0
2x^2-11x+5=0
4x^2-16x+7=0
10x^2-9x-7=0
2x^2-13x-7=0
2x^2-3x-2=0
-2x^2+3x-1=0
2x^2-17x-9=0
2x^2-x-6=0
12x^2+16x-3=0
6x^2-13x+2=0
3x^2-7x+2=0
5x^2-11x+2=0
2x^2-9x+9=0
2x^2+3x-9=0
x^2+2x-3=0
x^2-6x+5=0
x^2-3x+2=0
x^2-12x+32=0
x^2+6x-16=0
3x^2-12x-15=0
2x^2-11x-21=0
方程的.
1,x-y=2
xy=15
2,x+y=6 y=42
5,x+y=11,x-y=1
6,x+y=12,xy=35
7,x+y=5,xy=6
8,x-y=5,xy=36
9,x+y=10,xy=25
10,x+y=17,y-x=1
11,xy=2,x-y=1
12,x+y=3,xy=913,x+y=12,xy=11
14,x-y=8,xy=9
15,x+y=4,x-y=2
16,x+y=3,xy=0
17,x-y=5,xy=6
18,y-x=3,xy=28
19,y-x=2,xy=24
20,x+y=9,x-y=1,
21. 66x+17y=3967 25x+y=1200
22. 18x+23y=2303 74x-y=1998
23. 44x+90y=7796 44x+y=3476
(4) 76x-66y=4082 30x-y=2940
(5) 67x+54y=8546 71x-y=5680
化简求值
^代表平方 1.已知|a+3|+(b-1)^=0,求3a^-2ab+b^的值.
2.已知(a-1)^+4(b+2)+|c+1|=0,求(a^-ac+c^)-2(a^+bc-2c^)的值.
3.(3x^-2y^-3xy)-(2x^-3y^+xy),其中x^+y^=2,xy=-1.
4.(-a^-ab+b^)-(-a^+2ab+b^),其中a=-1/15,b=10.
5.已知:|a+1/2|+(b-3)^=0,求代数式[(2a+b)^+(2a+b)(b-2a)-6b]\(2b)的值. 6.10a(5乘以a的平方-b)-2a(5b+25乘以a的平方)-3ab,其中a=1,b=1/23. 7.1/3x^3-2x^2+2/3x^3+3x^2+5x-4x+7,(x=2) 先化简,再求值.
8.5abc-{2a²b[3abc-(4ab²-a²b)]-2ab²}其中a=-2,b=3,c=-1/4.
9.已知a²+a-1=0,求代数式a³+2a²+5的值.
10.(a+2)的二次方-(a-1)(a+1),其中a=3.25 先化简再求值
11.(X-1)的二次方+(x+3)(x-3)+(x-3)(x-1),其中X的二次方-2x=2
12.已知:a+b=12,a的平方+b的平方=74 求ab的值
13.先化简,再求值 (4x-3y)的平方-(3x-2y)(3x+2y),其中x=2,y=1
14.化简求值:(1 + a - 5a)-(- a +2a ),其中a= - 3
15.已知3分之a=4分之b=5分之c,求代数式2b-a分之2a+b+c的值
16.(x-3)2+|y+2|=0则yx的值为( )
17.设a,b,c为有理数,且|a|+a=0,|ab|=ab,|c|-c=0 求式子|b|-|a+b|-|c-b|+|a-c|的值
18.9x+6x^2-3(x-2/3x^2),其中x=-2 9x+6x^2-3x+11/3x^2=6x+29/3x^2=6*(-2)+29/3*(-2)=-12-58/3=-94/3
19.1/4(-4x^2+2x-8)-(1/2x-1),其中x=1/2 -x^2+1/2x-2-1/2x+1=-1/2^2+1/4-2-1/4+1=1/4-1=-3/4
20.(5a^2-3b^2)+(a^2+b^2)-(5a^2+3b^2),其中a=-1,b=1 5a^2-3b^2+a^2+b^2-5a^2-3b^2=5-3+1+1-5-3=-6+2=-4
21.2(a^2b+ab^2)-2(a^2b-1)-2ab^2-2,其中a=-2,b=2 2a^2*2b+2ab^2-2a^2*2b*2-2ab^2-2=8*4-4*4-2=-18X^2-X-6=0
2X^2-3X-2=0
-3X^2+6X=2
4X^2-4X+1=0
X^2-2X+3=0
-X^2-2X+8=0
X^2-X-2=4
2X^2-3X+1=0
-3X^2+4X+4=0
4X^2-11X-3=3
x^2-2x-3=0
4x^2-1=0
5x^2-3x+2=0
-x^2-2x+8=0
-2x2+x+3=0
2x^2+3x-9=0
x^2-9=0
4x^2-10x-6=0
5x^2-8x-4=0
3x^2+4x-4=0
6x^2+7x-5=0
x^2-8x+12=0
2x^2-6x+3=0
2x^2+9x-5=0
3x^2-16x+5=0
2x^2-11x+5=0
4x^2-16x+7=0
10x^2-9x-7=0
2x^2-13x-7=0
2x^2-3x-2=0
-2x^2+3x-1=0
2x^2-17x-9=0
2x^2-x-6=0
12x^2+16x-3=0
6x^2-13x+2=0
3x^2-7x+2=0
5x^2-11x+2=0
2x^2-9x+9=0
2x^2+3x-9=0
x^2+2x-3=0
x^2-6x+5=0
x^2-3x+2=0
x^2-12x+32=0
x^2+6x-16=0
3x^2-12x-15=0
2x^2-11x-21=0
{3x-2y=12 2、{2x+y=5
{x+2y=14 {3x+2y=8
3、{2x+3y= -1 4、{x+4y=8
{4x-9y=8 {x-4y=10
5、{4x+3y=5 6、{3x+5y=88
{2x-y=-5 {2x-y=1 2x+17=35
3x-64=11
12+8x=52
0.8x-4.2=2.2
2x+5=10
3x-15=75
4x+4o=320
3x+77=122
5x-1.6=0.6
6x-4=20
10x-0.6=2.4
500-12x=1401) 66x+17y=3967
25x+y=1200
(2) 18x+23y=2303
74x-y=1998
(3) 44x+90y=7796
44x+y=3476
(4) 76x-66y=4082
30x-y=2940
(5) 67x+54y=8546
71x-y=5680
(6) 42x-95y=-1410
21x-y=1575
(7) 47x-40y=853
34x-y=2006
答案:x=59 y=48
(8) 19x-32y=-1786
75x+y=4950
(9) 97x+24y=7202
58x-y=2900
(10) 42x+85y=6362
63x-y=1638
(11) 85x-92y=-2518
27x-y=486
(12) 79x+40y=2419
56x-y=1176
(13) 80x-87y=2156
22x-y=880
(14) 32x+62y=5134
57x+y=2850
(15) 83x-49y=82
59x+y=2183
(16) 91x+70y=5845
95x-y=4275
(17) 29x+44y=5281
88x-y=3608
(18) 25x-95y=-4355
40x-y=2000
(19) 54x+68y=3284
78x+y=1404
(20) 70x+13y=3520
52x+y=2132
(21) 48x-54y=-3186
24x+y=1080
(22) 36x+77y=7619
47x-y=799
(23) 13x-42y=-2717
31x-y=1333
(24) 28x+28y=3332
52x-y=4628
(25) 62x-98y=-2564
46x-y=2024
(26) 79x-76y=-4388
26x-y=832
(27) 63x-40y=-821
42x-y=546
(28) 69x-96y=-1209
42x+y=3822
(29) 85x+67y=7338
11x+y=308
(30) 78x+74y=12928
14x+y=1218
(31) 39x+42y=5331
59x-y=5841
(32) 29x+18y=1916
58x+y=2320
(33) 40x+31y=6043
45x-y=3555
(34) 47x+50y=8598
45x+y=3780
(35) 45x-30y=-1455
29x-y=725
(36) 11x-43y=-1361
47x+y=799
(37) 33x+59y=3254
94x+y=1034
(38) 89x-74y=-2735
68x+y=1020
(39) 94x+71y=7517
78x+y=3822
这里大概有300道题了,望采纳,拜托!