Question

Find the product ( algebric expression) ​

Answer 1

$find \: the \: product \: = > (x + 7y)(x - 7y) \\ \\ = > {x }^{2} - 7xy + 7xy - 49 {y}^{2} \\ \\ = > {x}^{2} - 49 {y}^{2} \: \: \: \: ans..$

Answer 2

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

${a}^{2} + {b}^{2} = (a + b)(a - b)$

$= {x}^{2} + ( {7)}^{2} \\ \\ = {x}^{2} + 49{y}^{2}$