化简5a²[a²+(5a²-2a)-2(a²-3a)]
问题描述:
化简5a²[a²+(5a²-2a)-2(a²-3a)]
答
5a²[a²+(5a²-2a)-2(a²-3a)]
=5a²[a²+5a²-2a-2a²+6a]
=5a²(4a²+4a)
=20a^4+20a^3