m+3 5
问题描述：
m+3 5
----- ÷[------ --m--2 ] 化简,我嫌麻烦,忙烦你了,
m-2 m-2
答
=(m+3)/(m-2)*(m-2)/(5-(m-2)(m+2))
=(m+3)/(5-(m-2)(m+2))
=(m+3)/(9-m^2)
=(m+3)/((3-m)(3+m))
=1/(3-m)