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If $x+y = 17$ and $x^2 + y^2 = 145$, then find $xy$

 Sep 9, 2022
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Note that \(x^2 + y^2 = (x+y)^2 - 2xy\)

 

So, \(17^2 - 2xy = 145\)

 

Now, solve for xy.

 Sep 9, 2022

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