Question

Factor 3x2 − 12x − 36 completely.

Answer 1

First you can take out a 3 and get\[3(x^2-4x-12)\]

Answer 2

3(x − 6)(x + 2)
(3x + 6)(x − 2)
3(x + 4)(x − 3)
(3x − 4)(x + 3)

Answer 3

those are answer choices

Answer 4

You know it has to be either A or C because the 3 is factored out.

Answer 5

C

Answer 6

No, it would be A. Multiply it out to check it.

Answer 7

One obvious factor is 3 getting
x2 -4x-12 or 3(x2 - 4x - 12)
now factor further the x2 -4x -12.

Answer 8

ok

Answer 9

So i got (3x+6)(x-6)

Answer 10

Factor the (3x+6) "factor completely" means every factor must be prime.

Answer 11

oh! So it would be A!

Answer 12

Can you help with one more?

Answer 13

A was a good choice, better than rest.

Answer 14

Which expression is a factor of 3ab − 6a + 4b − 8?

Answer 15

4b − 2
3a + 4
3b − 4b
3ab − 2

Answer 16

i got a

Answer 17

Its A.

Answer 18

3ab-6a+4b-8
3a(b-2) +4(b-2)
(b-2)(3a+4) are the factors

Answer 19

I personally don't like A. Hopefully you can see why I prefer B.