(x-y)^4·(x-y)-2(y-x)³·(y-x)²怎么算,
(2x-y)²-4(x-y)(x+2y)
化简:(2x-y)²-4(x-y)(x+y)
(y-x)(x-y)^3(y-x)^5怎么算
1/2 x²y·( )=2x³y-x²y²
(x-y)·2(x-y)²·3(x-y)³ 计算
{(x,y) |x|+|y|
x>y?x:y
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
计算 [12(x+y)³(y-x)]³÷[4(x+y)²(x-y)]²
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
(x-2y)²+(2x-4y)(x+y)+(x+y)²