来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/11/08 21:49:51
综合除法因式分解x^3-5x^2 2x 8
解题思路: x^3-5x^2+2x+8 =x^3-4x^2-x^2+2x+8 =x^2(x-4)-(x^2-2x-8) =x^2(x-4)-(x+2)(x-4) =(x-4)(x^2-x-2) =(x-4)(x+1)(x-2)
解题过程:
x^3-5x^2+2x+8
=x^3-4x^2-x^2+2x+8
=x^2(x-4)-(x^2-2x-8)
=x^2(x-4)-(x+2)(x-4)
=(x-4)(x^2-x-2)
=(x-4)(x+1)(x-2)