分解因式3m(m+n)-6(m²-n²)要准确啊,
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:2024/06/23 02:56:01
分解因式3m(m+n)-6(m²-n²)要准确啊,
快
快
![分解因式3m(m+n)-6(m²-n²)要准确啊,](/uploads/image/z/18504438-6-8.jpg?t=%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F3m%28m%2Bn%29-6%28m%26%23178%3B-n%26%23178%3B%EF%BC%89%E8%A6%81%E5%87%86%E7%A1%AE%E5%95%8A%2C)
解
3m(m+n)-6(m²-n²)
=3m(m+n)-6(m-n)(m+n)
=3(m+n)[m-2(m-n)]
=3(m+n)(2n-m)
3m(m+n)-6(m²-n²)
=3m(m+n)-6(m-n)(m+n)
=3(m+n)[m-2(m-n)]
=3(m+n)(2n-m)