(-3a³)²·a³+(-4a)²·a^7-(5a³)³

问题描述:

(-3a³)²·a³+(-4a)²·a^7-(5a³)³
(-3a³)²·a³+(-4a)²·a^7-(5a³)³


(-3a³)²×a³+(-4a)²×a^7-(5a³)³
=(9a^6)×a³+16a²×a^7-125a^9
=9a^9+16a^7-125a^9
=(9+16-125)a^9
=-100a^9