计算：[-0.6(x+y)] [2(x+y)]^2 [(-5/6)(x+y)^4] =

题目

计算：[-0.6(x+y)] [2(x+y)]^2 [(-5/6)(x+y)^4] =

答案

将x+y看作一个整体,系数相乘
[-0.6*4*(-5/6)][(x+y)(x+y)^2(x+y)^4]
=2(x+y)^7