2(a3次方)2次方乘A3次方-(3A的3次方)3次方+(5A)的2次方乘A的7次方=?

问题描述:

2(a3次方)2次方乘A3次方-(3A的3次方)3次方+(5A)的2次方乘A的7次方=?

2(a3次方)2次方乘A3次方-(3A的3次方)3次方+(5A)的2次方乘A的7次方
看不太懂
题目是不是 [2(a^3)]^2 * a^3 -(3a^3)^3 +(5a)^2*a^7
如果是 =4a^6 *a^3 -27a^9 +25a^2 *a^7
=4a^9-27a^9+25a^9 =2a^9