2(x³-2y²)-(x-2y)-(x-3y²+2x³)
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?
合并同类项:-6x²y-x+5x²y-2x+x³y+3x
已知方程组2x-y=10,x+2y=11,求(2x-y)³-(2x-y)²(x-3y)的值
运用乘法公式(x+y+1)(x+y-1)(2x-y-3)²(2x-y-3)³【(x+2)(x-2)】
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
(2x-y)²-4(x-y)(x+2y)
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
化简:(2x-y)²-4(x-y)(x+y)
(3x-y)²-2x(4x-5y)-(x+2y)²
(x-2y)²+(2x-4y)(x+y)+(x+y)²
{(x-y)²+(x+y)(x-y)}÷2x