(m-n)(3m-n)²+(m+3n)²(n-m)今晚就要!帮帮偶!
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 04:01:47
![(m-n)(3m-n)²+(m+3n)²(n-m)今晚就要!帮帮偶!](/uploads/image/z/341975-47-5.jpg?t=%28m-n%29%283m-n%29%26%23178%3B%2B%28m%2B3n%29%26%23178%3B%28n-m%29%E4%BB%8A%E6%99%9A%E5%B0%B1%E8%A6%81%21%E5%B8%AE%E5%B8%AE%E5%81%B6%21)
(m-n)(3m-n)²+(m+3n)²(n-m)今晚就要!帮帮偶!
(m-n)(3m-n)²+(m+3n)²(n-m)
今晚就要!帮帮偶!
(m-n)(3m-n)²+(m+3n)²(n-m)今晚就要!帮帮偶!
(m-n)(3m-n)²+(m+3n)²(n-m)
=(m-n)(3m-n)²+[-(m+3n)²(m-n)]
=(m-n)(3m-n)²-(m+3n)²(m-n)
=(m-n)[(3m-n)²-(m+3n)²]
=(m-n)[(3m-n)+(m+3n)][(3m-n)-(m+3n)]
=(m-n)(4m+2n)(2m-4n)
=4(m-n)(2m+n)(m-2n)
(m-n)(3m-n)²+(m+3n)²(n-m)
=(m-n)(3m-n)²-(m-n)(m+3n)²
=(m-n)[(3m-n)²-(m+3n)²]
=(m-n)(3m-n+m+3n)(3m-n-m-3n)
=(m-n)(4m+2n)(2m-4n)
=4(m-n)(2m+n)(m-2n)
原式=(m-n)[(3m-n)^2-(3n-m)^2] =(m-n)[9m^2-9n^2+n^2-m^2] =(m-n)[8m^2-8n^2] =8(m-n)^2(m+n)
=(m-n)(3m-n)^2-(m-n)(m+3n)^2
=(m-n)[(3m-n)^2-(m+3n)^2]
=(m-n)(3m-n+m+3n)(3m-n-m-3n)
=(m-n)(4m+2n)(2m-4n)
=4(m-n)(2m+n)(m-2n)
(m-n)(3m-n)²+(m+3n)²(n-m)
= (m-n)[3m-n)² - (m+3n)²]
= (m-n)(3m-n+m+3n)(3m-n-m-3n)
= (m-n)(4m+2n)(2m-4n)
= 4(m-n)(2m+n)(m-2n)