2x²(x-y)²+xy(y-x)³答案是几
x³y-2x²y²+xy³
x²/xy-x/y
[-xy/(x-y)²]²×(y²-xy/x)³
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
化简x-y分之x + x³-2x²y+xy²分之y³ ÷ y²-x
计算:(xy-x²)×x-y/xy
多项式因式分解 1,(x-y)³-(x-y)²(x+y) 2,x(x²-xy)-(4x
先化简,再求值:{xy(x²-3y)+3xy²}(-2xy)+x³y²(2x-y
先化简在求值(x+y)²-(x-y)(x+y)-(xy)²÷(xy),其中x,y是方程组『3x+2y
2x+y=0,求4x²+2xy(x+y)+y³
因式分解x的5次方y-x³y+2x²y-xy
-x³y³-x²y²+xy