#### Answer

$(7y-8x)(7y+8x)$

#### Work Step by Step

RECALL:
A difference of two squares can be factored using the formula:
$a^2-b^2=(a-b)(a+b)$
Using the formula above, we obtain:
$49y^2-64x^2
\\= (7y)^2-(8x)^2
\\ = (7y-8x)(7y+8x)$

Published by
Cengage Learning

ISBN 10:
1285194055

ISBN 13:
978-1-28519-405-9

$(7y-8x)(7y+8x)$

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