Question

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

Answer 1

`= 9x^2 - 4`

Explanation:

`(3x+2)(3x-2)`

• 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`

`= 9x^2 - 4`