化简(x+2y)(x-2y)(x²—4y²)
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)
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
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
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+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
因式分解 (1).(x+y)(x+y-6)+9 (2).x²-16y²-x-4y
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]