化简9-6m+m平方/2m-4除以(m+2-5/m-2)

问题描述:

化简9-6m+m平方/2m-4除以(m+2-5/m-2)

原式=(m-3)/[2(m-2)]/[(m-4-5)/(m-2)] =(m-3)/[2(m-2)]x(m-2)/[(m-3)(m+3)] =(m-3)/[2(m+3)]