分解因式(x^2+3x+2)(x^2+11x+30)-12 如题.(x^2+3x+2)(x^2+11x+30)-12
1个回答
展开全部
x^2+3x+2)(x^2+11x+30)-12
=(x+1)(x+2)(x+5)(x+6)-12
=[(x+1)(x+6)][(x+2)(x+5)]-12
=[x^2+7x+6][x^2+7x+10]-12
=(x^2+7x)^2+16(x^2+7x)+60-12
=(x^2+7x)^2+16(x^2+7x)+48
=(x^2+7x+4)(x^2+7x+12)
=(x^2+7x+4)(x+3)(x+4)
=(x+1)(x+2)(x+5)(x+6)-12
=[(x+1)(x+6)][(x+2)(x+5)]-12
=[x^2+7x+6][x^2+7x+10]-12
=(x^2+7x)^2+16(x^2+7x)+60-12
=(x^2+7x)^2+16(x^2+7x)+48
=(x^2+7x+4)(x^2+7x+12)
=(x^2+7x+4)(x+3)(x+4)
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
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