(21x⁴y³-( )+7x²y²)÷﹙-7x²y)= ( )+5x
x(x-y)-y(y-x)+(x-y)²因式分解
因式分解 -5x³y(x-y)³+20y【x²(y-x)】²
2.(x+y)²(x-y)²-(x-y)(x+y)(x²+y²)
5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
{(x-y)²+(x+y)(x-y)}÷2x
(x-y)³(y-x)(y-x)²+(x-y)^6
因式分解x²(x-2y)+y²(2y-x)
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
[x(x²y²-xy)-y(x²-x³y)]÷3x²y