因式分解:a(a-2)(a-3)(a+1)+2
问题描述:
因式分解:a(a-2)(a-3)(a+1)+2
答
=(a²-2a)(a²-2a-3)+2
=(a²-2a)²-3(a²-2a)+2
=(a²-2a-2)(a²-2a-1)
答
原式=[a(a-2)][(a-3)(a+1)]+2
=(a²-2a)[(a²-2a)-3]+2
=(a²-2a)²-3(a²-2a)+2
=(a²-2a-1)(a²-2a-2)