## anonymous one year ago Factoring a Trinomial?

1. anonymous

$12x ^{2}-31x+7$

2. jim_thompson5910

have you learned the quadratic formula?

3. anonymous

Yes, I've gotten every other question correct, it's just this one question that i'm getting wrong.

4. jim_thompson5910

ok use the quadratic formula to find the solutions to 12x^2 - 31x + 7 = 0 tell me what those roots are

5. anonymous
6. anonymous

this will help you so much its a trick where you can solve any trinomial

7. anonymous

basically you times the first term by last term which in ur case is 12 and 7

8. anonymous

$12 \times 7 = 84$

9. anonymous

now you need to find two factors of 84 which if multiply gives you 84 and when add gives you -31

10. anonymous

so if you $28 \times 3 = 84$

11. anonymous

now in order to get -31 these two number should be -28 and -3

12. anonymous

$(-28) + (-3)$

13. anonymous

now you equation will be $12x ^{2} -3x -28x +7$

14. anonymous

now only thing you have to do is factor it , can u plz do that if u have trouble i ll help u

15. skullpatrol

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