(-3x²y³)(x²-1)-(x²-1)×5x²y³
因式分解 -5x³y(x-y)³+20y【x²(y-x)】²
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
运用乘法公式(x+y+1)(x+y-1)(2x-y-3)²(2x-y-3)³【(x+2)(x-2)】
[x(x²y²-xy)-y(x²-x³y)]÷3x²y
因式分解:[x(x²y²-xy)-y(x²-x³y)]÷3x²y
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
(x-y)³(y-x)(y-x)²+(x-y)^6
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
1/2 x²y·( )=2x³y-x²y²
先化简再求值:(x-2y)²-(x+2y)(x-2y)-(x-3y)(x-y).其中x²+9y
因式分解:1、[x(x²y²-xy)-y(x²-x³y)]÷3x²y.
2.(x+y)²(x-y)²-(x-y)(x+y)(x²+y²)