(m+2+5/2-m)*2m-4/3-m
问题描述:
(m+2+5/2-m)*2m-4/3-m
答
原式=[(m+2)(m-2)-5]/(m-2)*[-2(m-2)/(m-3)]
=-(m²-9)/(m-2)*2(m-2)/(m-3)
=-(m+3)(m-3)/(m-2)*2(m-2)/(m-3)
=-2(m+3)
=-2m-6