x 1分之x的平方-x乘x分之x 1-搜答案-智慧作业帮

(4-4x+x²)分之(2x-6)÷(x+3)×(3-x)分之(x²+x-6)=(x-2)²分之[2(x-3)]×(x+3)分之1×[-(x-3)]分之[(x+3)(x-

〔(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

=[2(x-3)/(x-2)^2]/(x+3)*[(x-2)(x+3)/(x+3)]=2(x-3)/[(x-2)(x+3)]=(2x-6)/(x^2+x-6)

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)

(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

=[(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-5分之x-5-x分之x)\x的平方-25分之2x=2x/(x-5)*(x-5)(x+5)/2x=x+5

原式=[(x+y)/(x-y)]^2*[2(x-y)/5(x+y)-[X/(x^2y^2)]/[x/(x+y)]=2/5-[x/(x^2y^2)]*[(X+y)/x]=2/5-(x^2y^2)/(x+

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

2x/9-7x²/27=16两边乘277x²-6x+432=0判别式=(-6)²-4×7×432

∵（-x-2)/x²>=0x²>0∴-x-2>=0∴x

=(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

X1+X2=-6/2=-3X1*X2=-3/21/X1+1/X2=(X1+X2)/(X1X2)=-3/(-3/2)=2

（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-

(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)(