#### Answer

$5x^{2}$

#### Work Step by Step

$7x^{2}+8x^{2}-10x^{2}$
Combine like terms (same base + same exponent = like terms)
$7x^{2}+8x^{2}-10x^{2}=5x^{2}$
$$5x^{2}$$

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

$5x^{2}$

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