Question

Factorise it plzzzz​

Answer 1

Here is ur answer mate.....

Answer 2

Answer:

$\: \: \: \: \: {r}^{2} - 9 {s}^{2}$

$= ( {r)}^{2} - ( {3s})^{2}$

Here, a = r and b = 3s

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

$= > {r}^{2} - 9 {s}^{2} = (r + 3s)(r - 3s)$