问题
解答题
(a2+3a-3)(a2+3a+1)-5.
答案
(a2+3a-3)(a2+3a+1)-5
=(a2+3a)2-2(a2+3a)-8
=(a2+3a-4)(a2+3a+2)
=(a+4)(a-1)(a+1)(a+2).
(a2+3a-3)(a2+3a+1)-5.
(a2+3a-3)(a2+3a+1)-5
=(a2+3a)2-2(a2+3a)-8
=(a2+3a-4)(a2+3a+2)
=(a+4)(a-1)(a+1)(a+2).