化简:x²-4y²-(x-2y)²
化简:(2x-y)²-4(x-y)(x+y)
(x-2y)²+(2x-4y)(x+y)+(x+y)²
(2x-y)²-4(x-y)(x+2y)
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
(3x-y)²-2x(4x-5y)-(x+2y)²
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
2.(x+y)²(x-y)²-(x-y)(x+y)(x²+y²)
【(X²+Y²)-(X-Y)²+2Y(X-Y)】/4Y=1,求4X/4X²-Y&
化简(x²y-4y²)/(x²+4xy+4y²)*[(4xy)/(x-2y)+x
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²