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5 votes
What is
m(n+1)-n(m-1)

1 Answer

4 votes
m(n+1)-n(m-1) (distribute m into (n+1))
mn+1m-n(m-1) (distribute -n into (m-1))
mn+1m-nm+1n (collect like terms) (the mn cancel out)
m+n
User Shazoo
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