# How do you simplify (3x + 2)(3x - 2) ?

Apr 1, 2016

$= 9 {x}^{2} - 4$

#### Explanation:

$\left(3 x + 2\right) \left(3 x - 2\right)$

• Applying the below mentioned property we can simplify the expression:
color(blue)((a+b)(a-b)= a^2 - b^2

Here : color(blue)(a=3x , b=2

(3x+2)(3x-2) = color(blue)((3x)^2 - 2^2

$= 9 {x}^{2} - 4$