Question

How do I factor this 3x^2-12?

Answer 1

Well first you need to take the greatest common factor out:
3(x^2-4)
then factor that out:
3(x-2)(x+2)

Answer 2

and you will finally get 3(x-2)(x+2)

Answer 3

How do i find the greatest common factor?

Answer 4

3x^2-12

GCF is 3

because 3x1 =3
and 3x4=12

Answer 5

what number can be multiplied into both 3 and 12?

Answer 6

@uri exactly

Answer 7

3x^2-12
3(x^2-4)

Answer 8

Now i know that the gcf is 3 how do i factor now?

Answer 9

well divide it by 3 like uri showed.