(x+y)²-(x³+y³)÷(x+y)等于?
(x-y)³(x-y)²(y-x)等于多少
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
(x+y)²-(x³+y³)÷(x+y)等于?
(x-2y)³÷(2y-x)²为什么等于x-2y?
(x-y)²×(y-x)³ 等于多少 解法.
(x-y)²(y-x)³等于多少.
(x+y)²-(x+y)³等于多少啊
计算 [12(x+y)³(y-x)]³÷[4(x+y)²(x-y)]²
(x-y)³+9(x-y)-6(x-y)²
(x-2y)³÷(2y-x)²等于多少? (-x)²×(-x)³等于多少?
化简x-y分之x + x³-2x²y+xy²分之y³ ÷ y²-x
[x(x²y²-xy)-y(x²-x³y)]÷3x²y