x-2分之x-3乘以想平方2-6x 9分之x平方2-4

[3a^3/(x+y)]^3*(x^2-y^2)/[(y-x)/(x+y)]^2=27a^9/(x+y)^3*(x+y)*(x-y)*(x+y)^2/(x-y)^2=27a^9/(x-y)

(1-x)^2/(x^2+4x+4)/(x-1)^2*(x^2+3x+2)/(x-1)=(x+1)/(x+2)(x-1)=(x+1)/(x^2+x-2)再问：是1-x的平方，不是（1-x）的平方再答：

(x分之x的平方-y的平方)乘以(x的平方-2xy+y的平方分之2x)其中x=2y=1=(x^2-y^2)/x*2x/(x-y)^2=(x+y)(x-y)/x*2x/(x-y)^2=2(x+y)/(x

首先计算(x+3)/(x^2-1)乘以（x^2-2x+1）/(x^2+4x+3),分解因式可以得到(x+3)/(x+1)(x-1)乘以(x-1)^2/(x+3)(x+1),约分后等于(x-1)/(x+

x减1分之x平方减1,化简为x+1得2005+1=2006第二问不太清楚

1）3x2）2x分之3y3）x分之x-y求采纳,以后有问题直接问我再问：求过程。谢谢好人~再答：这也要过程……？！好吧我试试1）原式=根号下{（2x分之y）×（2y分之3x²）×（x分之12

原式=2(x+3)(x-2)/(x-2)²x(x+3)-1/(x-2)=2/x(x-2)-1/(x-2)=(2-x)/x(x-2)=-x

)【(x²-2x+1)/(x²-1)】÷【(x-1)/(x²+x)】=【(x-1）²/(x+1)（x-1)】÷【(x-1)/x(x+1)】=【(x-1）/(x+

=(x+2y)(x-2y)/(x+2)²×(x+2)/3x(x+2y)=(x-2y)/3x(x+2)=(x-2y)/(3x²+6x)

原式=[3x/(x-1)-x/(x+1)]×[(x²-1)/x]={3x(x+1)/[(x-1)(x+1)]-x(x-1)/[(x-1)(x+1)]}×[(x-1)(x+1)/x]=[3x(

(x^2-4y^)\(x+y)^2乘以2x(x+y)/(x+2y)=2x(x-2y)\(x+y)

3分之1乘以x的平方+2x+3=1/3(x^2+6x+9)=1/3(x+3)^2再问：还有几个您也帮我解了吧，不胜感激5x-30乘以x的平方+45乘以x的3次方12mn-m的平方乘以n-36n（x-2

（x/2y）²×（y/2x）-x/y²÷（2y²/x）=x²/2y×（y/2x）-（x/y²）×（x/2y²）=x/8y-x²/（

[(x-2)分之3x-2分之x]×x分之(x²-4)=[2(x-2)分之6x-2(x-2)分之(x²-2x)]×x分之[(x+2)(x-2)]=2(x-2)分之(4x-x²

(x+1)分之1-(x²-1)分之1×(x+1)分之(x²-2x+1)=(x+1)分之1-[(x+1)(x-1)]分之1×(x+1)分之(x-1)²=(x+1)分之1-(

1乘以2分之x+2乘以3分之x+.+2012乘以2013分之x=2012(1-1/2+1/2-1/3+……+1/2012-1/2013)x=2012(1-1/2013)x=20122012/2013x

4-4x+4x的平方分之2x-6除以(x-3)乘以3-x分之(x+3)乘以(x-2)=(2x-6)÷4÷(x-3)×(x+3)÷(3-x)×(x-2)=(x-3)÷2÷(x-3)×(x+3)÷(3-x

4b分之3a乘以9a的平方分之2b=3a/(4b)×2b/(3a)²=1/(6a)x的平方+2x+1分之x除以x的平方-1分之x的平方+2x=x/(x+1)²÷[x(x+2)/(x

“x的平方-4x+4分之x-1乘以2x-2分之x的平方-4”数学表示式是：[(x-1)/(x-4x+4)]×[(x²-4)/(2x-2)]；原式=[(x-1)/(x-2)²]×{[