a³-a²b+ab²+a²b-ab²+b³ 合并同类项
问题描述:
a³-a²b+ab²+a²b-ab²+b³ 合并同类项
答
a³-a²b+ab²+a²b-ab²+b³
=a³-a²b+a²b-ab²+ab²+b³
=a³-(a²b-a²b)-(ab²-ab²)+b³
= a^3+b^3