Question

Evaluate using identities
${ {7a}^{2} + 8b^{2}} { \: 7a^{2} - {8b}^{2} }$
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Answer 1

Answer:

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Answer 2

$49 {a}^{4} - 64 {b}^{4} \\ \\ using \:(a + b)(a - b) = {a}^{2} - {b}^{2}$

Hope it help

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