合并同类项-5/3(x+y)²-6(x+y)+3(x+y)²+4/3(x+y)

问题描述:

合并同类项-5/3(x+y)²-6(x+y)+3(x+y)²+4/3(x+y)

-5/3(x+y)²-6(x+y)+3(x+y)²+4/3(x+y)
=4/3(x+y)²-14/3(x+y)