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Questions  >>  Olympiad-Math  >>  Class 8
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Q)

If $x^2+y^2 =10$ and $xy =3$ , the value of $5(x+y)^2 +3(x-y)^2=$

$\begin{array}{1 1} 90 \\ 91 \\ 92 \\ 93 \end{array} $

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