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

- anonymous

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

- chestercat

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- anonymous

Factor out a 2 to start.

- anonymous

Okay.. I did that

- anonymous

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

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## More answers

- anonymous

Then you would use the AC method.

- anonymous

AC method?

- anonymous

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?

- anonymous

Yeah :D

- anonymous

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

- anonymous

Sorry I was trying to fix a printer haha

- anonymous

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

- anonymous

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

- anonymous

Step 2: Find two integers when multiplied together get 36, but when added together equal your middle term: 5
-4 and 9

- anonymous

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

- anonymous

Step 3: Rewrite the middle term by replacing the (5x) with the two numbers chosen. (-4 and 9)
6x^2 -4x +9x + 12 = 0

- anonymous

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

- anonymous

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

- anonymous

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.

- anonymous

I have another one..

- anonymous

alright :)

- anonymous

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

- anonymous

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

- anonymous

Did it not post?

- anonymous

Nope haha

- anonymous

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

- anonymous

so what are you trying to find terms for?

- anonymous

huh?

- anonymous

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

- anonymous

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

- anonymous

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 :)

- anonymous

Ohtayyyy

- anonymous

So do you know where to go from there?

- anonymous

No lol

- anonymous

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

- anonymous

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

- anonymous

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

- anonymous

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

- anonymous

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

- anonymous

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

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