xy2·(-xy)2化简

xy2·(-xy)2化简 -2x2y(-2xy2)2+(2xy)3×( xy2) 计算题：(-1/3xy2)[xy(2x-y)+xy2], 计算:3xy(x2y-xy2+xy)-xy2(2x2-3xy+2x)因式分解 5xy2-【3xy2-(4xy2-2x2y)】+2x2y】+2x2y-xy2 化简,再求值 Xy2次方加Xy2次方加Xy xy2-2xy-3x-y2-2y-1因式分解. 因式分解：(1)a5-a (2)xy2-2xy+xxiexiele (6x2y-xy2-1/2x2y3)/(-3xy) xy2-2xy+2y-4 用什么公式xy2-2xy+2y-4用什么公式 (xy2)2÷(xy2)3 因式分解x3+x2+xy-xy2 试说明代数式(x3+3x2y-4xy2+6y3)-(2x3-x2y-xy2-y3-1)+(x34x2y+3xy2-7y3)的值与xy取值无关 当x等于1,y等于2时,求代数式3xy2-【2xy2-2(xy-1.5x2y)】+xy-3x2y的值 求[2（x2y-xy2）+xy（2xy-x2）]÷x2y注：x2 xy2 x2y中的2是平方,我不会打平方的符号 3x2y+xy2-[2xy2-4x2y+(x2y-2xy2)] 2x^2y+{2xy-[3x^2y-2(-3xy2+2xy)]-4xy^2} 2xy2次方-2x2次方y其中y-x=3xy=6/1