Question

Factoring Trinomials with Negative Numbers

x2 + x – 12

6. x2 – 2x – 8

Answer 1

If you FOIL (x+4)(x-3) what do you get?

Answer 2

ok thnk

Answer 3

u got it? great!

Answer 4

#6 is kinda hard in a way

Answer 5

you need factors of -8 that sum to -2

Answer 6

-1*8
1*-8
-2*4
2*-4

Answer 7

which pair adds up to -2?

Answer 8

need help?

Answer 9

yeah im so lost

Answer 10

Here is the factored version of #6: (x+2)(x-4)

Answer 11

F O I L
watch what happens when I FOIL it: x^2 -4x +2x -8

Answer 12

Thanks

Answer 13

now simplify the middle two terms =x^2 -2x -8
notice how the factors of 8=-4*2 add up to the middle term -2?
then look at the factored form and you see the -4 and +2 in the factors

Answer 14

good?