How much is -x^2+7 y^2-3 x y less than 2 x^2-y^2+x y ? - Vidyadip

Question

How much is $-x^2+7 y^2-3 x y$ less than $2 x^2-y^2+x y$ ?

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Answer

$3 x^2-8 y^2+4 x y$

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