Question

Factorise
$64a {}^{2} + 12b {}^{2} + 112ab$

Answer 1

Helo... ☺


please refer to the attachment above
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Answer 2

HOPE YOU HAVE MADE A MISTAKE IN THE QUESTION
$64 {a}^{2} + 49 {b}^{2} + 112ab \\ = {(8a)}^{2} + {(7b)}^{2} + 2(8a)(7b) \\ = {(8a + 7b)}^{2}$