am*an=amn, then m(n-2)+n(m-2) is ___________

Hi, I have a question and I hope anyone could answer it:

am*an=amn, then m(n-2)+n(m-2) is ___________ .

1 Answer

  1. Answer:

    We know that, 

    am.an=am+n
    That is, 
    mn=m+n.
    Now, 

    m(n2)+n(m2)=mn2m+nm2n=2mn2(m+n)=2(m+n)2(m+n)=0
     The required answer is 0.

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