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Mathematics

Grade10

Easy

Question

$text Simplify end text open parentheses 5 x squared plus 7 x minus 3 close parentheses minus open parentheses negative 2 x squared minus x plus 9 close parentheses$

$x - 12$
$7 x^{2} + x$
$7 x^{2} + 8 x - 12$
$8 x^{2} - x + 5$

The correct answer is: $7 x squared plus 8 x minus 12$

$open parentheses 5 x squared plus 7 x minus 3 close parentheses minus open parentheses negative 2 x squared minus x plus 9 close parentheses equals 5 x squared plus 7 x minus 3 plus 2 x squared plus x minus 9 equals 7 x squared plus 8 x minus 12$

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