Question

Factor completely: 3x2 − 6x − 9

Answer 1

(3x+3)(x-3)

Answer 2

x(x+1)(x-3)

Answer 3

First step, pull the 3 out. So you get 3(x^2-2x-3). Next step is to factor the x^2-2x-3 part. Find two numbers that multiply to -3 and sum to -2.

Answer 4

- 3x² + 6x - 9
= - 3 ( x² - 2x + 3 )

- 3 x ² = - 3, x, x
6x = 3, 2, x
- 9 = - 3, 3

- 3 is the common factor, ( - 3 because there are two negative 3's, and only one positive 3 )

My answer :
- 3 ( x² - 2x + 3 )