Question

计算[(9/m)+m-6][3/(m-3)+1]

Answer 1

因为[(9/m)+m-6]=(9+m^2-6m)/m=(m-3)^2/m

[3/(m-3)+1]=(3+m-3)/(m-3)=m/(m-3)

所以[(9/m)+m-6][3/(m-3)+1]=m-3