(m-2)(m²+2m+4)-2m(m²-3),其中m=2
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/29 05:58:12
(m-2)(m²+2m+4)-2m(m²-3),其中m=2
答:
(m-2)(m²+2m+4)-2m(m²-3)
=m³+2m²+4m-2m²-4m-8-2m³+6m
=-m³+6m-8
=-2³+12-8
=-4
-4........................
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来源:学生作业帮助网 编辑:作业帮 时间:2024/05/29 05:58:12
(m-2)(m²+2m+4)-2m(m²-3),其中m=2
答:
(m-2)(m²+2m+4)-2m(m²-3)
=m³+2m²+4m-2m²-4m-8-2m³+6m
=-m³+6m-8
=-2³+12-8
=-4
-4........................