化简算式2m-4分之3-m除以（m+2-m-2分之5）_数学解答

化简算式2m-4分之3-m除以（m+2-m-2分之5）

人气：262 ℃　时间：2020-06-27 05:00:48

解答

3-m/2m-4除以(m+2-5/m-2)
=(3-m)/2(m-2)÷((m+2)(m-2)-5)/(m-2)
=(3-m)/2(m-2)÷(m²-9)/(m-2)
=(3-m)/2(m-2)×(m-2)/(m+3)(m-3)
=-(m+3)/2;