Question

Прошу!!!Помогите!!!!!!!!!!

Answer 1

$49 times {x }^{2} - 112 times x times y + 64 times {y }^{2} = \ {(7x)}^{2} - 2 times 7x times 8y + {(8y)}^{2} = \ {(7x - 8y)}^{2} = (7x - 8y)(7x - 8y)$