(2x³y)×(-2xy)+(2x³y)³÷(2x²)
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:(-7x²y)(2x²y-3xy³+xy)
x³y-2x²y²+xy³
-2y³+(3xy²-x²y)-2(xy²-y³)
求【(2x³y-2x²y²)+xy(2xy-x²)】÷x²y的值
计算(2x³-3x²y-2xy²)-(x³-2xy²+y³)
(2x³- 3x²y -2xy²)-(x³- 2xy²+y³
计算:x²y-(2xy²-5x²y)+3xy²-y³
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
﹙4x³y²-2x⁴y²-½xy)÷(-1/2xy) (^人^)