# Determining Values for A, B, and C in Quadratic Formula

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• 07-19-2012, 10:41 AM
TiaharaJBennett
Determining Values for A, B, and C in Quadratic Formula
I have a question:

For the quadratic equation (2x+1)(x+3)=0, does 2=a, 1=b, and 3=c?
• 07-19-2012, 11:09 AM
srmichael
Determining Values for A,B, and C in Quadratic Formula
Quote:

Originally Posted by TiaharaJBennett
I have a question:

For the quadratic equation (2x+1)(x+3)=0, does 2=a, 1=b, and 3=c?

FIRST, please start a new thread for each new probelem you have.

No. The standard form of a quadratic equation is y = ax^2 + bx + c so you will first need to multiply (2x+1)(x+3) out and get it into standard form. Then you can see what a, b and c are.
• 07-20-2012, 03:20 PM
TiaharaJBennett
Quote:

Originally Posted by srmichael
FIRST, please start a new thread for each new probelem you have.

you will first need to multiple (2x+1)(x+3) out and get it into standard form. Then you can see what a, b and c are.

You mean multiply?
• 07-20-2012, 03:34 PM
mmm4444bot
Of course he means multiply! Have you not learned FOIL yet?! :cool:

• 07-20-2012, 03:43 PM
TiaharaJBennett
Quote:

Originally Posted by mmm4444bot
Of course he means multiply! Have you not learned FOIL yet?! :cool:

Yes, I know about FOIL. But I haven't used it since I was in 9th grade. I'll figure it out though.
• 07-20-2012, 03:46 PM
mmm4444bot
What grade are you in now?
• 07-20-2012, 03:50 PM
TiaharaJBennett
Quote:

Originally Posted by mmm4444bot
What grade are you in now?

I'm a junior.
• 07-20-2012, 04:22 PM
TiaharaJBennett
Okay, I did the FOIL method, and got:
2x2+7x+3 :)

2=a,7=b, and 3=c

• 07-20-2012, 04:31 PM
mmm4444bot
Yes.

Are you thinking that you need to use the Quadratic Formula to solve the equation (2x+1)(x+3) = 0 ?

If so, I would like you to know that there is a much simpler method that uses something called the Zero-Product Property.
• 07-20-2012, 04:33 PM
TiaharaJBennett
Quote:

Originally Posted by mmm4444bot
Yes.

Are you thinking that you need to use the Quadratic Formula to solve the equation (2x+1)(x+3) = 0 ?

If so, I would like you to know that there is a much simpler method that uses something called the Zero-Product Property.

I've never learned that. How does it work? But yeah, I was going to just use the quadratic formula.
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