Find the value of $mn$ if $m+n=8$ and $m-n=2$
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m+n=8
m-n=2
(m-n)²=(m+n)²-4mn
(2)²=(8)²-4mn
4=64-4mn
4mn=64-4
4mn=60
mn=15
m-n=2
(m-n)²=(m+n)²-4mn
(2)²=(8)²-4mn
4=64-4mn
4mn=64-4
4mn=60
mn=15
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