$(5 x^{2} + 6 x - 3) + (2 x^{2} - 7 x - 9)$

7 x^{2} - x - 12

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7 x^{2} - 2 x - 12

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7 x^{2} - 3 x - 12

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None of the above

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Solution

The correct option is A $7 x^{2} - x - 12$
$5 x^{2} + 6 x - 3$
$+ 2 x^{2} - 7 x - 9 - ------------ -$

$7 x^{2} - x - 12$

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