问题
解答题
计算：
|
答案
+12 m2-9
+2 3-m 2 m+3
=
+12 (m+3)(m-3)
+-2(m+3) (m+3)(m-3) 2(m-3) (m+3)(m-3)
=12-2(m+3)+2(m-3) (m+3)(m-3)
=12-2m-6+2m-6 (m+3)(m-3)
=0
搜题请搜索小程序“爱下问搜题”
计算：
|
+12 m2-9
+2 3-m 2 m+3
=
+12 (m+3)(m-3)
+-2(m+3) (m+3)(m-3) 2(m-3) (m+3)(m-3)
=12-2(m+3)+2(m-3) (m+3)(m-3)
=12-2m-6+2m-6 (m+3)(m-3)
=0