Chief Editor
Chief Editor
 Mar 23, 2024
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Which expression is equivalent to $9x^{2} + 7x^{2} + 9x^{2}$?
Difficulty: Easy
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A:

$63x^{4} + 9x$

B:

$9x^{2} + 16x$

C:

$25x^{5}$

D:

$16x^{2} + 9x$

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