因式分解:1.x³-2x²+3x-2 2.x的4次方+8x³+15x²-4x-20
答案:3 悬赏:0 手机版
解决时间 2021-02-01 12:35
- 提问者网友:爱了却不能说
- 2021-02-01 06:35
因式分解:1.x³-2x²+3x-2 2.x的4次方+8x³+15x²-4x-20
最佳答案
- 五星知识达人网友:时间的尘埃
- 2021-02-01 06:49
x³-2x²+3x-2
=x³-x²-x²+3x-2
=x³-x²-(x²-3x+2)
=x²(x-1)-(x-1)(x-2)
=(x-1)(x²-x+2)
x^4+8x³+15x²-4x-20
=(x^4+8x³+15x²)-(4x+20)
=x²(x²+8x+15)-4(x+5)
=x²(x+3)(x+5)-4(x+5)
=(x+5)(x³+3x²-4)
=x³-x²-x²+3x-2
=x³-x²-(x²-3x+2)
=x²(x-1)-(x-1)(x-2)
=(x-1)(x²-x+2)
x^4+8x³+15x²-4x-20
=(x^4+8x³+15x²)-(4x+20)
=x²(x²+8x+15)-4(x+5)
=x²(x+3)(x+5)-4(x+5)
=(x+5)(x³+3x²-4)
全部回答
- 1楼网友:梦中风几里
- 2021-02-01 08:50
1.(x^2-x+2)(x-1)
2.(x+2)^2(x-1)(x+5)
- 2楼网友:神也偏爱
- 2021-02-01 07:10
x³-2x²+3x-2
=x³-x²-x²+3x-2
=x³-x²-(x²-3x+2)
=x²(x-1)-(x-1)(x-2)
=(x-1)(x²-x+2)
x^4+8x³+15x²-4x-20
=(x^4+8x³+15x²)-(4x+20)
=x²(x²+8x+15)-4(x+5)
=x²(x+3)(x+5)-4(x+5)
=(x+5)(x³+3x²-4)
我要举报
如以上问答信息为低俗、色情、不良、暴力、侵权、涉及违法等信息,可以点下面链接进行举报!
大家都在看
推荐资讯