合并同类项:a+2b-3a+5b =
问题描述:
合并同类项:a+2b-3a+5b =
答
a+2b-3a+5b
= -2a + 7 b
合并同类项:a+2b-3a+5b =
a+2b-3a+5b
= -2a + 7 b