Question

please solve this question​

Answer 1

$\sf \: 16 {x}^{2} - 4 9{y}^{2} \\ \sf \implies \: ( {4x)}^{2} - ( {7y)}^{2} \\ \gray{ \sf \implies \: ( {a)}^{2} - ( {b)}^{2} = (a + b)(a - b)} \\ \\ \red{\sf \implies \: (4x + 7y)(4x - 7y).... \: ans}$

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