Question

(5p-7q)(5p+7q) using identies​

Answer 1

Answer:

using third identity (a+b)(a-b)

a² - b²

5p²- 7q²

Answer 2

$\underline{\underline{ \large\blue{ \mathcal{SOLUTION}}}} = >$

$\green{ = (5p - 7q)(5p + 7q)} \\ = {(5p)}^{2} - {(7q)}^{2} \\ \orange{ = > \underline{ \boxed{25 {p}^{2} - 49 {q}^{2} }}}$

Identity:-

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

Hope this may help!