化简m的平方-4分之2m-m-2分之m
问题描述:
化简m的平方-4分之2m-m-2分之m
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)