4x³y+12x²y²+9x y³/4x³-9x y²,其中

(x-y)³+9(x-y)-6(x-y)² 4x³y+12x²y²+9x y³/4x³-9x y²,其中 计算 [12(x+y)³(y-x)]³÷[4(x+y)²（x-y)]² (x-y)³(x-y)²(y-x)等于多少 分解因式：-12x^4y+8x²y²-4x²y³ 多项式因式分解 1,(x-y)³-(x-y)²(x+y) 2,x(x²-xy)-(4x&# 求因式分解(x-y)²-2(x-y)³和（x+y）（x-y）-x（x-y） x²+xy/(x-4y)(x+y),其中x=4,y=-1 已知4x²+y²-4x-6y+10=0求（2/3x（√9x）+(y²√x/y³) 已知4x²+y²-4x-6y+10=0,求(2/3√9x+y²√x/y³)-(x (2x-y)²-4(x-y)(x+2y) 化简：（2x-y)²-4(x-y)(x+y)