x+1分之x的平方-x乘x的平方-2x+1

头都看大了

〔(x-1)/(x+2)〕×〔(x^2-4)/(x^2-2x+1)〕÷(1/x^2)=〔(x-1)/(x+2)〕×〔(x+2)(x-2)/(x-1)^2〕×x^2＝〔(x^2)(x-1)(x+2)(x

原式=(x^2-1)/(x^2+2x)*(x-1)/x=(x-1)^2(x+1)/x^2(x+2),解不等式组：x+2>1,——》x>-1,2(x-1)>-6,——》x>-2,所以,解集为：x>-1,

再答：望采纳，谢谢

x的平方-9分之x的平方+2x-3乘x的平方-1分之x的平方-5x+6=(x-3)分之(x-1)乘[(x-1)(x+1)]分之(x-2)(x-3)=(x+1)分之(x-2)

=2x/x²-(2x-1)/x²=(2x-2x+1)/x²=1/x²

(x+x分之1)乘(x的平方+x的平方分之1)乘(x的四次方+想的四次方分之1)=(x-1/x)乘(x+x分之1)乘(x的平方+x的平方分之1)乘(x的四次方+想的四次方分之1)÷（x-1/x）=(x

原式=[(x+1)(x+2)/(x-1)(x-2)][-x(x-2)/3(x+1)]=-x(x-2)(x+1)(x+2)/[3(x-1)(x-2)(x+1)]=-x(x+2)/3(x-1)=-(x&s

先合并同类项得（a的平方-4）乘x的立方+（a+2）乘x的平方+x+1由于是关于x的2次多项式,x的立方项系数为0,所以a的平方-4=0,a=2或-2而且x的平方项系数不为0,则a+2不等于0,a不等

原式=[(x+1)/(x-1)]-[(x²-2x)/(x²-1)]×[(x²+2x+1)/(x²-x-2)]=[(x+1)/(x-1)]-{x(x-2)/[(x

[(x^2-2x+1)/x^2]÷(x^2-1)*[(x^2+x)/(x^2-3x+2)]=[(x-1)^2/x^2]÷[(x+1)(x-1)]*[x(x+1)/(x-1)(x-2)]=(x-1)^2

=[(x+2)/x(x-2)-(x-1)/(x-2)²]×x/(4-x)=[(x²-4-x²+4)/x(x-2)²]×x/(4-x)=1/(x-2)²

=x/(x+2)(x-2)-(x-2)/(x+2)(x-2)=[x-(x-2)]/(x+2)(x-2)=2/(x²-4)

原式=1/(x+1)*[(x-3)/(x+3)^2+2/(x+3)]-x/(x+3)(x-3)=1/(x+1)[3(x+1)/(x+3)^2]-x/(x+3)(x-3)=3/(x+3)^2-x/(x+

(x-1)^2/(4x)×（2x^2)/(x-x^2)=(x-1)^2/(4x)×（2x^2)/[-x(x-1)]=-(x-1)/2=(1-x)/2

=(x+2)/(x-3)×(x-3)²/(x+2)(x-2)=(x-3)/(x-2)

=x²/(x²+4)×(x+2)/x(x-2)-1/(x-2)=x(x+2)/(x²+4)(x-2)-1/(x-2)=[x(x+2)-(x²+4)]/(x

（xy-x的平方）÷xy分之x-y=x(y-x)*xy/(x-y)=-x^2y(x的平方+x分之4x的平方-1）乘(1-2x分之x+1)÷x分之1=[x(x+1)分之(2x+1)(2x-1)]乘(1-

原式=[2x(x+1)/(x+1)(x-1)-x(x-1)/(x-1)²]÷x/(x+1)=[2x/(x-1)-x/(x-1)]×(x+1)/x=x/(x-1)×(x+1)/x=(x+1)/

(x²+2x+1)分之(x+4)÷(x-2)分之x÷[x分之(x-2)×(x+1)分之(x+4)]=(x+1)²分之(x+4)×x分之(x-2)÷[x(x+1)]分之[(x-2)(