# How do you factor #3x^2 - 12#?

##### 1 Answer

Jan 2, 2016

#### Answer:

3(x-2)(x+2)

#### Explanation:

when factorising follow these steps

(1) is there a common factor?

(2) is it a trinomial ?

(3) is it a difference of 2 squares ?

in this case there is a common factor of 3 (1)

inside the bracket is a difference of 2 squares (3)

so