(2x-y)²-4(x-y)(x+2y)
(x-2y)²+(2x-4y)(x+y)+(x+y)²
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?
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
(x-y/x+2y)³
【(X²+Y²)-(X-Y)²+2Y(X-Y)】/4Y=1,求4X/4X²-Y&
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
因式分解 (1).(x+y)(x+y-6)+9 (2).x²-16y²-x-4y
(x+2y)(x-2y)*(x²-4y²)