Question

Factorize:

$9x^{2} - 4$
​

Answer 1

Answer:

$=> {(3x)}^2 - {(2)}^2$

As

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

So

$=> {(3x)}^2 - {(2)}^2 = (3x+2) (3x-2)$