anonymous
  • anonymous
I'm sure this looks extremely easy.. But I cant figure it out. factoring 12x^2-10x-12=0
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
Factor out a 2 to start.
anonymous
  • anonymous
Okay.. I did that
anonymous
  • anonymous
So then you divide by the 2 and end up with 6x^2 - 5x - 6 = 0

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anonymous
  • anonymous
Then you would use the AC method.
anonymous
  • anonymous
AC method?
anonymous
  • 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
  • anonymous
Yeah :D
anonymous
  • anonymous
haha okay well I did that from the get go, but I'm left with 36?
anonymous
  • anonymous
Sorry I was trying to fix a printer haha
anonymous
  • anonymous
it's okay.. I totally understand. I'm just thankful someone replied!
anonymous
  • 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
  • anonymous
Step 2: Find two integers when multiplied together get 36, but when added together equal your middle term: 5 -4 and 9
anonymous
  • 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
  • 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
  • anonymous
Not at all :) Do you know where to go from there?
anonymous
  • 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
  • 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
  • anonymous
I have another one..
anonymous
  • anonymous
alright :)
anonymous
  • anonymous
I'm sure you're going to think I'm dumb again.. lol
anonymous
  • anonymous
I didn't think you were dumb in the first place..
anonymous
  • anonymous
Did it not post?
anonymous
  • anonymous
Nope haha
anonymous
  • 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
  • anonymous
so what are you trying to find terms for?
anonymous
  • anonymous
huh?
anonymous
  • 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
  • anonymous
It doesnt specify which method to use.. But I'm sure thats what it is lol
anonymous
  • 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
  • anonymous
Ohtayyyy
anonymous
  • anonymous
So do you know where to go from there?
anonymous
  • anonymous
No lol
anonymous
  • anonymous
oh.. haha so find numbers that when multiplied get 30 and add up to 1
anonymous
  • anonymous
Sorry my laptop froze.. Anyways I got 6 and -5 ... Duh!
anonymous
  • anonymous
Sorry, my internet went out, and my tutee came haha So, do you know where to go from there?
anonymous
  • 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
  • anonymous
Yeah, I am a math tutor. :) And you really should finish :/
anonymous
  • 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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