Simplify:
$7 x y + 5 y^{2} + 6 y x + 6 y^{2}$

13 x y + 11 y^{2}

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11 x y + 13 y^{2}

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12 x y + 11 y^{2}

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14 x y + 13 y^{2}

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Solution

The correct option is A $13 x y + 11 y^{2}$
Given,
Like terms: $(7 x y, 6 y x$ ) and $(5 y^{2}, 6 y^{2})$
$7 x y + 5 y^{2} + 6 y x + 6 y^{2}$
$= 7 x y + 6 y x + 6 y^{2} + 5 y^{2}$
$= 13 x y + 11 y^{2}$

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(6 x^{2} - 5 y)^{2}

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