1/(6x-4y )-1/(6x+4y )-3x/(4y²-9x²)
因式分解 (1).(x+y)(x+y-6)+9 (2).x²-16y²-x-4y
{4/(x+y)+6/(x-y)=3 {9/(x-y)-1/(x+y)=1
因式分解:25(x+y)²-9(x-y)²;(x+y)²-4(x+y-1).
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
因式分解:(1)x²+x (2)4x²-9y (3)x²y-4y
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
已知4x²+y²-4x-6y+10=0求(2/3x(√9x)+(y²√x/y³)
谢谢(关于因式分解)2x²+xy-y²-4x+5y-6x²-2x-14(x-y+1)+y(
已知x²+|y+x|=x-1/4,求(3x+y)²(2x-y)²-(4x²+y&
化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²
【(X²+Y²)-(X-Y)²+2Y(X-Y)】/4Y=1,求4X/4X²-Y&