3x(x-y)³-6y(y-x)²
(x-y)³+9(x-y)-6(x-y)²
(x-y)³(y-x)(y-x)²+(x-y)^6
化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²
合并同类项:-6x²y-x+5x²y-2x+x³y+3x
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
(x-y)³(x-y)²(y-x)等于多少
(x+y)²+x+y-6因式分解
{(x,y) |x|+|y|
x>y?x:y
36x²y-48xy² y(x-y)²-(y-x)³ 3ax²+6ax
[x(x²y²-xy)-y(x²-x³y)]÷3x²y
【x(x²y²-xy)-y(x²-x³y)】÷3x²y