3x³y³·(-2/3x²y)²+(-1/3x²y)³·9x
(x-y)·2(x-y)²·3(x-y)³ 计算
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
合并同类项:-6x²y-x+5x²y-2x+x³y+3x
(x-y)³+9(x-y)-6(x-y)²
2x²+1/2y²-2x-3y+5=0,求(2x√9x-y²√x/y³)-(√1
x·(9x³y-3xy²)÷(﹣3x²y) 计算
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
【x(x²y²-xy)-y(x²-x³y)】÷3x²y
因式分解:[x(x²y²-xy)-y(x²-x³y)]÷3x²y
1/2 x²y·( )=2x³y-x²y²
x四次方+x³-3x²-4x-4 x(x-1)+y(y+1)-2xy (x-2)³-(y-