Question

I'm sure this looks extremely easy.. But I cant figure it out. factoring 12x^2-10x-12=0

Answer 1

Factor out a 2 to start.

Answer 2

Okay.. I did that

Answer 3

So then you divide by the 2 and end up with
6x^2 - 5x - 6 = 0

Answer 4

Then you would use the AC method.

Answer 5

AC method?

Answer 6

is that where you take the coefficient of the first term and multiply it with the last term and find two multiples that add to equal the middle term?

Answer 7

Yeah :D

Answer 8

haha okay well I did that from the get go, but I'm left with 36?

Answer 9

Sorry I was trying to fix a printer haha

Answer 10

it's okay.. I totally understand. I'm just thankful someone replied!

Answer 11

Actually I lied haha, wrong method sorry. Well, right method but in the wrong way.
Step 1: Multiply your first term by your last term:
6 x 6 = 36

Answer 12

Step 2: Find two integers when multiplied together get 36, but when added together equal your middle term: 5

-4 and 9

Answer 13

OMG! I feel like the biggest idiot! I so had that I just didnt even thing about making the four negative wow. you probably think I'm so dumb lol

Answer 14

Step 3: Rewrite the middle term by replacing the (5x) with the two numbers chosen. (-4 and 9)

6x^2 -4x +9x + 12 = 0

Answer 15

Not at all :) Do you know where to go from there?

Answer 16

Yes:] I do.. Thank you So much! And you better not go anywhere.. I'm sure I will need you again.. I have 50 more to go lol

Answer 17

Haha alright :)
I think I will write the rest of the steps anyway just in case anyone else needs to know how to do the AC method.

Answer 18

I have another one..

Answer 19

alright :)

Answer 20

I'm sure you're going to think I'm dumb again.. lol

Answer 21

I didn't think you were dumb in the first place..

Answer 22

Did it not post?

Answer 23

Nope haha

Answer 24

2x^2+X-15=0

This seriously looks as easy as the first one.. Thats sweet of you to not think I'm dumb lol

Answer 25

so what are you trying to find terms for?

Answer 26

huh?

Answer 27

Are you using the AC method? First term times last term? 2 X 15
So you are looking for terms that multiply to get 30 and add up to get your middle term, which in this case is 1

Answer 28

It doesnt specify which method to use.. But I'm sure thats what it is lol

Answer 29

Whenever you are trying to factor and you have a number in front of your x^2 term, you are going to want to use the AC method :)

Answer 30

Ohtayyyy

Answer 31

So do you know where to go from there?

Answer 32

No lol

Answer 33

oh.. haha so find numbers that when multiplied get 30 and add up to 1

Answer 34

Sorry my laptop froze.. Anyways I got 6 and -5 ... Duh!

Answer 35

Sorry, my internet went out, and my tutee came haha
So, do you know where to go from there?

Answer 36

Tutee? And yes I finished it.. I'm not going to do the rest of my paper though.. I'm just gonna turn it in as is haha

Answer 37

Yeah, I am a math tutor. :) And you really should finish :/

Answer 38

Aweee! That's awesome! You can tutor me too lol.. Anyways I'm excused from class because of a death in the family but I still have to turn it in before seven