Factor completely 2x2 - 6x - 36.

2 (x - 3) (x + 6)

2 (x - 6) (x + 3)

(2x - 4) (x + 9)

(2x - 9) (x + 4)

To factor out completely, we should have reached the most simplified form,

first we should take out 2.

2 (x2 - 3x - 18)

then we should factor out the inside of the parenthesis,

2 (x - 6) (x + 3)

And that's the most simplified and factored out form.

The final answer is then the second option, 2 (x - 6) (x + 3)