化简m的平方-4分之2m-m-2分之m_数学解答

化简m的平方-4分之2m-m-2分之m

人气：279 ℃　时间：2019-12-21 22:10:00

解答

原式=2m/(m+2)(m-2)-(m+2)/(m+2)(m-2)
=(2m-m-2)/(m+2)(m-2)
=(m-2)/(m+2)(m-2)
=1/(m+2)