(a+2)(a-3)[(a^2)-7]+(2+a)(3-a)(a+3)
问题描述:
(a+2)(a-3)[(a^2)-7]+(2+a)(3-a)(a+3)
答
(a+2)(a-3)(a²-7)+(2+a)(3-a)(a+3)
=(a+2)(a-3)(a²-7)-(2+a)(a-3)(a+3)
=(a+2)(a-3)[(a²-7)-(a+3)]
=(a+2)(a-3)[(a²-a-10)]