化简 |m|+| (2+m-m^2) 除以(m+1) |

|m|+| (2+m-m^2) 除以(m+1) |
=|m|+| (m^2-m-2)/(m+1) |
=|m|+| (m-2)(m+1)/(m+1) |
=|m|+|m-2|
(1)当m>=2
上式=m+m-2=2m-2
(2)当0
再问： =|m|+| (m^2-m-2)/(m+1) m^2前负号呢
再答： |m|+| (2+m-m^2) 除以(m+1) | =|m|+|- (m^2-m-2)/(m+1) | =|m|+| (m^2-m-2)/(m+1) |
再问： =|m|+|2-m| 这对吗
再答： 对的