x2y2(x+y)-8xy(x+y)+16(x+y)
问题描述:
x2y2(x+y)-8xy(x+y)+16(x+y)
答
x2y2(x+y)-8xy(x+y)+16(x+y)
=(x+y)(x2y2-8xy+16)
=(x+y)(xy-4)2.