拓展提高第一题
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/30 20:42:09
拓展提高第一题
![](http://img.wesiedu.com/upload/9/a5/9a5c6ad4c89aa49cc3e6a912863cc752.jpg)
![](http://img.wesiedu.com/upload/9/a5/9a5c6ad4c89aa49cc3e6a912863cc752.jpg)
![拓展提高第一题](/uploads/image/z/18948517-61-7.jpg?t=%E6%8B%93%E5%B1%95%E6%8F%90%E9%AB%98%E7%AC%AC%E4%B8%80%E9%A2%98%26nbsp%3B)
^表示次方
^2表示2次方
(x-1)(x-2)(x-3)(x-4)-24
=[(x-1)(x-4)][(x-2)(x-3)]-24
=[(x^2-5x)+4][(x^2-5x)+6]-24
=(x^2-5x)^2+10(x^2-5x)+24-24
=(x^2-5x)^2+10(x^2-5x)
=(x^2-5x)(x^2-5x+10)
=x(x-5)(x^2-5x+10)
^2表示2次方
(x-1)(x-2)(x-3)(x-4)-24
=[(x-1)(x-4)][(x-2)(x-3)]-24
=[(x^2-5x)+4][(x^2-5x)+6]-24
=(x^2-5x)^2+10(x^2-5x)+24-24
=(x^2-5x)^2+10(x^2-5x)
=(x^2-5x)(x^2-5x+10)
=x(x-5)(x^2-5x+10)