Factor 3x2 - 6x - 9 completely

3 (x^2-2x-3)

3 (x-3) (x+1)

3 (x-3) (x+1)

Step-by-step explanation:

3x^2 - 6x - 9

Factor out a 3

3 (x^2 - 2x-3)

Now we factor inside the parentheses

What 2 numbers multiply to - 3 and add to - 2

-3*1 = - 3

-3+1 = - 2

3 (x-3) (x+1)