2(a^3)^2×(a^3)-(3a^3)^3+(5a^2)×a^7怎么化简

问题描述:

2(a^3)^2×(a^3)-(3a^3)^3+(5a^2)×a^7怎么化简

原式=2a^6×a^3-27a^9+5a^2×a^7
=2a^9-27a^9+5a^9
=-20a^9