(xy2)2÷(xy2)3

(xy2)2÷(xy2)3 3x2y+xy2-[2xy2-4x2y+(x2y-2xy2)] 5xy2-【3xy2-(4xy2-2x2y)】+2x2y】+2x2y-xy2 化简,再求值 (X3-2x2y+xy2)÷（x3-xy2）要求约分 -2x2y(-2xy2)2+(2xy)3×( xy2) -3x2y+2x2y+3xy2-2xy2 计算题：(-1/3xy2)[xy(2x-y)+xy2], -3x2+2x2y+xy2 (x2y)3 × (-xy2)3 -xy2/2是不是单项式? 计算:3xy(x2y-xy2+xy)-xy2(2x2-3xy+2x)因式分解 化简：5（3x2y-xy2) * (xy2+3x2y) （xy2次方）2次方 x3-2x2y+xy2-x 因式分解:x3-2x2y+xy2 x3+2x2+xy2因式分解 xy2·(-xy)2化简 已知:(x+2)2+|y+1|=0,求5xy2-{2x2y-[3xy2-(4xy2-2x2y)]}的值