Question

Factor 3x² - 15x - 42.

a)3(x - 2)(x - 7)
b)3(x - 2)(x + 7)
c)3(x - 7)(x + 2)

Answer 1

factor out the 3 1st

Answer 2

and?

Answer 3

what would you get then

Answer 4

3?

Answer 5

3(what is left in the parenthesis after you divide everything by 3)

Answer 6

1x2

Answer 7

3(x - 7)(x + 2)

Answer 8

3x^2-15x-42 when each term is divide by 3 you get
x^2 - ? - ?

Answer 9

That's the answer.