x[x二次方-5]-x二次方[x-3]-3x[1 x x二次方]
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∵x=2010∴3x²+(2x²-3x)-(-4x+5x²)=3x²+2x²-3x+4x-5x²=(3+2-5)x²+(4-3)x
(x^2+4)^2-16x^2=(x^2+4)^2-(4X)^2=(x^2+4X+4)(X^2-4X+4)=(X+2)^2*(X-2)^2
已知x二次方减去5x加1等于0解得:x1=(5+根号(21))/2,x2==(5-根号(21))/2而(x^2+1/(x^2))=(x+1/x)*(x+1/x)-2=(5*(5+根号(21))/(5+
1、原式=-x^6-3x^6-6x³+6x²=-4x^6-6x³+6x²2、原式=(3/4)a^6x²/(3/5)ax²+(6/5)a&su
(x²+1)/x=根号5x²+1是分子吧分子分母同除以xx+1/x=根号5(x+1/x)²=5x²+1/x²=3(x四次方+x二次方+1)/(x四次方
1.-2x平方-3x+5.5计算:1.2x平方+2x+32.-1.5x平方+7xy-0.65y平方2.3x平方-6x-63.5x平方-3+34.6x平方-7x-1.5
(x²-1)²+6(x²-1)+9=(x²-1+3)²=(x²+2)²只需要把x²-1看做一个整体就行泪笑为您解答,如若
x四次方-6x三次方+9x二次方分之x二次方-3x=x(x-3)/x²(x²-6x+9)=(x-3)/x(x-3)²=1/x(x-3)=1/(x²-3x)如追加
(5+x)^2=75===>5+x=±√75=±5√3===>x=-5±5√3(2+x)^2=4(3-x)^2===>(2+x)^2=[2(3-x)]^2===>2+x=2(3-x),或者2+x=-2
x^2+3xy+2y^2+4x+5y+3=(x+y)(x+2y)+3(x+y)+(x+2y)+3=(x+y)(x+2y+3)+(x+2y+3)=(x+y+1)(x+2y+3)
3x的二次方-(2x的二次方+5x-1)-(3x+1),=3x²-2x²-5x+1-3x-1=x²-8x=100-80=20
3x三次方2x二次方-{5x-2-[6-2x-(-x二次方+3x三次方)]=6X^5-[5X-2-6+2X+(-X^2+3X^3)]=6X^5-(7X-8-X^2+3X^3)=6X^5-3X^3+X^
1,ab(x^2+1)+x(a^2+b^2)=abx^2+x(a^2+b^2)+ab=(ax+b)(bx+a)2,4a^2-ab+b^2-c^2(题有误)3,9m^2-6m+2n-n^2=(3m-1)
答:x=-1,y=2(3x²y-2xy²)-(xy²-2x²y)-(3x²y²+2x²y)-(-3x²y²-2
原式=3x²+3x+1=3×(-5)²+3×(-5)+1=75-15+1=61
代数式(3x的二次方-4)-(2x二次方-5x+6)+(x二次方-5x)=[3×(-2)²-4]-[2×(-2)²-5(-2)+6]+[(-2)²-5×(-2)]=3×4
将X代入算术,得:5*(-5)+3*(-5)二次方-[2*(-5)-2*(-5)二次方-1]=(-25)+3*25-[-10-2*25-1]=-25+75+10+50+1=111
原式=x²y(x-y)²-2xy(x-y)²=xy(x-y)²(x-2)再问:原式=x²y(x-y)²-2xy(y-x)²再答:对
x²-5x=x(x-5)
令原式=z,z=x^2-4xy+4y^2+4x^2+12x+9+16z=(x-2y)^2+(2x+3)^2+16因为平方是大于等于零的,故最小值的时候,平方里面为零,则,z=16,就是最小值,最小值的