分解因式:2x^4-1/8
因式分解:(1)2x^4-1/8(2)(x^2+3x+3)(x^2+3x-4)+6(3)(x^2-5x)(x^2-5x-2)-24...
因式分解:(1)2x^4-1/8 (2)(x^2+3x+3)(x^2+3x-4)+6 (3)(x^2-5x)(x^2-5x-2)-24
展开
2个回答
展开全部
(1)2x^4-1/8
=2(x^4-1/16)
=2(x^2-1/4)(x+1/4)
=2(x+1/2)(x-1/2)(x+1/4)
(2)(x^2+3x+3)(x^2+3x-4)+6
令x^2+3x=a
原式=(a+3)(a-4)+6
=a^2-a-12+6
=(a-3)(a+2)
=(x^2+3x-3)(x^2+3x+2)
=(x^2+3x)(x+1)(x+2)
(3)(x^2-5x)(x^2-5x-2)-24
令x^2-5x=a
原式=a(a-2)-24
=a^2-2a-24
=(a-6)(a+4)
=(x^2-5x-6)(x^2-5x+4)
=(x-6)(x+1)(x-1)(x-4)
=2(x^4-1/16)
=2(x^2-1/4)(x+1/4)
=2(x+1/2)(x-1/2)(x+1/4)
(2)(x^2+3x+3)(x^2+3x-4)+6
令x^2+3x=a
原式=(a+3)(a-4)+6
=a^2-a-12+6
=(a-3)(a+2)
=(x^2+3x-3)(x^2+3x+2)
=(x^2+3x)(x+1)(x+2)
(3)(x^2-5x)(x^2-5x-2)-24
令x^2-5x=a
原式=a(a-2)-24
=a^2-2a-24
=(a-6)(a+4)
=(x^2-5x-6)(x^2-5x+4)
=(x-6)(x+1)(x-1)(x-4)
展开全部
- -
(1)2x^4-1/8
=2(x^4-1/16)
=2(x^2-1/4)(x+1/4)
=2(x+1/2)(x-1/2)(x+1/4)
(2)(x^2+3x+3)(x^2+3x-4)+6
令x^2+3x=a
原式=(a+3)(a-4)+6
=a^2-a-12+6
=(a-3)(a+2)
=(x^2+3x-3)(x^2+3x+2)
=(x^2+3x)(x+1)(x+2)
(3)(x^2-5x)(x^2-5x-2)-24
令x^2-5x=a
原式=a(a-2)-24
=a^2-2a-24
=(a-6)(a+4)
=(x^2-5x-6)(x^2-5x+4)
=(x-6)(x+1)(x-1)(x-4)
同楼上.~
(1)2x^4-1/8
=2(x^4-1/16)
=2(x^2-1/4)(x+1/4)
=2(x+1/2)(x-1/2)(x+1/4)
(2)(x^2+3x+3)(x^2+3x-4)+6
令x^2+3x=a
原式=(a+3)(a-4)+6
=a^2-a-12+6
=(a-3)(a+2)
=(x^2+3x-3)(x^2+3x+2)
=(x^2+3x)(x+1)(x+2)
(3)(x^2-5x)(x^2-5x-2)-24
令x^2-5x=a
原式=a(a-2)-24
=a^2-2a-24
=(a-6)(a+4)
=(x^2-5x-6)(x^2-5x+4)
=(x-6)(x+1)(x-1)(x-4)
同楼上.~
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