( )·2x²y=10x³y²-8x²y²
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
(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)
1/2 x²y·( )=2x³y-x²y²
因式分解 -5x³y(x-y)³+20y【x²(y-x)】²
(x-2y)²+(2x-4y)(x+y)+(x+y)²
(x-y)³(y-x)(y-x)²+(x-y)^6
(x-y)³+9(x-y)-6(x-y)²
(x-y)³(x-y)²(y-x)等于多少
(2x-y)²-4(x-y)(x+2y)
化简:(2x-y)²-4(x-y)(x+y)
已知x²-y²=10,求[(x+y)³-2y(x+y)²-4(x+y)]÷(x+