计算16/m^2-4+2/m+4的结果是

问题描述:

计算16/m^2-4+2/m+4的结果是
A.m+8/m^2-16 B.2/m-4 C.2/m+4 D.2m+16/m^2-16

16/(m²-4)+2/(m+2)
=16/(m+2)(m-2)+2(m-2)/(m+2)/(m-2)
=(16+2m-4)/(m+2)(m-2)
=2(m+6)/(m²-4)