xy³-2x²y+x³y
x³y-2x²y²+xy³
[-xy/(x-y)²]²×(y²-xy/x)³
先化简,再求值:{xy(x²-3y)+3xy²}(-2xy)+x³y²(2x-y
化简x-y分之x + x³-2x²y+xy²分之y³ ÷ y²-x
2x+y=0,求4x²+2xy(x+y)+y³
因式分解x的5次方y-x³y+2x²y-xy
-x²y+2xy²-y³ 因式分解
多项式因式分解 1,(x-y)³-(x-y)²(x+y) 2,x(x²-xy)-(4x
-2y³+(3xy²-x²y)-2(xy²-y³)
x²-2xy+y²分之x²+2xy-3y³如何因式分解
因式分解:(x+y)³+2xy-2x²y-2xy²-1
计算:(-7x²y)(2x²y-3xy³+xy)