a(a+1)(a+2)(a+3)+1
2011-01-13
展开全部
a(a+1)(a+2)(a+3)+1
=[a(a+3)][(a+1)(a+2)]+1
=(a^2+3a)(a^2+3a+2)+1
=(a^2+3a)^2+2(a^2+3a)+1
==(a^2+3a+1)^2
=[a(a+3)][(a+1)(a+2)]+1
=(a^2+3a)(a^2+3a+2)+1
=(a^2+3a)^2+2(a^2+3a)+1
==(a^2+3a+1)^2
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询