A 6B=6 3A-6B=4
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?=(6a+b)-(4a-b)+(4a-b)/2=6a+b-4a+b+4a/2-b/2=6a-4a+4a/2+b+b-b/2=4a+3b/2
4b+2a/9b-6a-4a-6b/3a+6b=—2(a+2b)/3(2a-3b)—2(2a-3b)/3(a+2b)因为a+2b/2a-3b=3所以—2(a+2b)/3(2a-3b)=—2/3乘以(a
3a^2b-{2a^2b+[9a^2b-(6a^2b+4a^2)]-(3a^2b-8a^2)}=3a^2b-2a^2b-[9a^2b-(6a^2b+4a^2)]+(3a^2b-8a^2)=a^2b-9
如果a-2b/a+2b=3,a+2b/a-2b+3a-6b/4a+8b=1/3+3(a-2b)/4(a+2b)=1/3+3/4×3=1/3+9/4=4/12+27/12=31/12;很高兴为您解答,s
a^2-6a+4b^2+8b+13=0,配方得:(a^2-6a+9)+(4b^2+8b+4)=0,即:(a-3)^2+(2b+2)=0,所以:a-3=2b+2=0,解得:a=3,b=-1,所以:a^b
答案是-20/9因为(a+2b)/(2a-3b)=3所以(2a-3b)/(a+2b)=1/3原式=2(a+2b)/(-3)(2a-3b)-2(2a-3b)/3(a+2b)=-2/3×3-2/3×1/3
左式=r4-r3,r3-r2,r2-r1abbb0aa+ba+2b0a2a+b3a+3b0a3a+b6a+4b=r4-r3,r3-r2abbb0aa+ba+2b00a2a+b00a3a+b=r4-r3
即(a²-6a+9)+(b²-4b+4)=0(a-3)²+(b-2)²=0所以a-3=b-2=0a=3,b=2所以原式=√(3/2)+√(2/3)=√6/2+√
合并同类项:=6a²b²-12a²b提取公因式:=6a²b(b-2)
最后的结果为8,a--,4-1=3,b--,6-1=5,a+b=3+5=8
a-2b/a+2b=3a-2b=3(a+2b)a-2b=3a+6b-2a=8ba=-4b所以,2+(2b/a)-2b+3a-(6b/4a)+8b=2+(2b/-4b)-2b+3(-4b)-(6b/-1
a^2+b^2-4a-6b+13=0(a^2-4a+4)+(b^2-6b+9)=0(x-2)^2+(b-3)^20a-2=0a=2b-3=0b=3a+b=2+3=5
(3a+2b)^2+(3a-2b)^2-(6a-4b)(3a-2b)=(3a+2b)^2+(3a-2b)^2-2*(3a-2b)(3a-2b)=(3a+2b)^2-(3a-2b)^2=(3a+2b+3
1.a²+b²-4a+6b+13=0a、b的值(a-2)²+(b+3)²=0∴a=2,b=-32.x、y满足x²+y²-6x+8y+25=0
原式=a^2+b^2-6a-8b+9+16=0a^2+9-6a+b^2+16-8b=0(a-3)^2+(b-4)^2=0a-3=0,b-4=0a=3,b=43a+4b=3*3+4*4=25
因为(a-2b)/(a+2b)=3所以(a+2b)/(a-2b)=1/3且(3a-6b)/(4a+8b)=3(a-2b)/4(a+2b)=(3/4)*3=9/4所以所求答案为31/12
325000/88=3693.16记T=A6B+16,所以T的十位数为7或者8因为,A6B+16=88x(x属于非负整数)所以T可以取得值为:176(2*88)、880(10*88)当T=176时,A
a*a+b*b-2a+4b+5=0.即(a-1)^2+(b+2)^2=0.∴a=1,b=-2.代入原式=-2.
解a²+b²+13-4a+6b=0(a-2)^2+(b+3)^2=0a=2b=-3(a+b)/(a-b)=(2-3)/(2+3)=-1/5
a²+b²-6a+4b+13=0a²-6a+9+b²+4b+4=0(a-3)²+(b+2)²=0所以a=3b=-2a的b次方=3^(-2)=