本帖最后由 别叫我名 于 2012-10-31 10:00 PM 编辑
回复 35# QKeitaroQ
(4m/2m^2-50) divided by (m/m-50) 1. = (4m/2m^2-50) multiple with (m-50/m)
2. = (4m-20/2m^2-50)
3. = (2m-10/m^2-25)
4. = (2m-10/ (m+5)(m-5) )
5. = ( 2(m-5) )/ (m+5)(m-5) )
6. = (2/m+5)
不知道对吗?
步骤2涉及simplify 4m被msimplify成4,然后就4Xm-50,下面就是2m^2-50 X 1