分解因式:2x^4+13x^3+20x^2+11x+2 6x^2+x
分解因式:2x^4+13x^3+20x^2+11x+26x^2+xy-15y^2+4x-25y-10...
分解因式:2x^4+13x^3+20x^2+11x+2
6x^2+xy-15y^2+4x-25y-10 展开
6x^2+xy-15y^2+4x-25y-10 展开
4个回答
展开全部
2x^4+13x^3+20x^2+11x+2
=2x^4+x^3+12x^3+6x^2+14x^2+7x+4x+2
=x^3(2x+1)+6x^2(2x+12)+7x(2x+1)+2(2x+1)
=(2x+1)(x^3+6x^2+7x+2)
=(2x+1)(x^3+x^2+5x^2+5x+2x+2)
=(2x+1)[x^2(x+1)+5x(x+1)+2(x+1)]
=(2x+1)(x+1)(x^2+5x+2)
6x^2+xy-15y^2+4x-25y-10
=(3x-5y)(2x+3y)+4x-25y-10
=(3x-5y)(2x+3y)-5(2x+3y)+2(3x-5y)+(-5)×2
=(3x-5y-5)(2x+3y+2)
=2x^4+x^3+12x^3+6x^2+14x^2+7x+4x+2
=x^3(2x+1)+6x^2(2x+12)+7x(2x+1)+2(2x+1)
=(2x+1)(x^3+6x^2+7x+2)
=(2x+1)(x^3+x^2+5x^2+5x+2x+2)
=(2x+1)[x^2(x+1)+5x(x+1)+2(x+1)]
=(2x+1)(x+1)(x^2+5x+2)
6x^2+xy-15y^2+4x-25y-10
=(3x-5y)(2x+3y)+4x-25y-10
=(3x-5y)(2x+3y)-5(2x+3y)+2(3x-5y)+(-5)×2
=(3x-5y-5)(2x+3y+2)
追问
太感谢了
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
2015-12-21
展开全部
2x^4+13x^3+20x^2+11x+2
=2x^4+x^3+12x^3+6x^2+14x^2+7x+4x+2
=x^3(2x+1)+6x^2(2x+12)+7x(2x+1)+2(2x+1)
=(2x+1)(x^3+6x^2+7x+2)
=(2x+1)(x^3+x^2+5x^2+5x+2x+2)
=(2x+1)[x^2(x+1)+5x(x+1)+2(x+1)]
=(2x+1)(x+1)(x^2+5x+2)
=2x^4+x^3+12x^3+6x^2+14x^2+7x+4x+2
=x^3(2x+1)+6x^2(2x+12)+7x(2x+1)+2(2x+1)
=(2x+1)(x^3+6x^2+7x+2)
=(2x+1)(x^3+x^2+5x^2+5x+2x+2)
=(2x+1)[x^2(x+1)+5x(x+1)+2(x+1)]
=(2x+1)(x+1)(x^2+5x+2)
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