Question

Select one of the factors of 3x2 + 12x – 36
Answer

6

x – 3

x + 6

x + 2

Answer 1

You can factor out a 3 to begin with so that gives you
3(x^2 + 4x - 12)
The two numbers that you can multiply to get the last term -12 and add to get the middle term 4 are 6 and -2
Then we have

3(x + 6)(x - 2)

The only choice that matches any of these factors is the answer, x + 6