What is the value of the coefficient of "a" when the quadratic equation y = (3x + 1)(3x − 2) is written in standard form?
−2
−3
9
6

- anonymous

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- schrodinger

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- skullpatrol

Any ideas?

- anonymous

Nope

- anonymous

but i think its is B

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## More answers

- skullpatrol

why?

- anonymous

I think i am not sure

- skullpatrol

Use FOIL on $$\huge y = (3x + 1)(3x − 2) $$

- anonymous

wait be right back

- anonymous

well i think it is A

- skullpatrol

why?

- anonymous

idk

- anonymous

you should multiply

- anonymous

(3x + 1)(3x − 2) FOIL method

- anonymous

like the person above wrote..so start 3x(3x)+1(3x)+.. keep going and recall that the number in front of the \[x^2 \] is your a

- anonymous

so remember the way quadratics are written are in this standard form: y=\[ax^2+bx+c\]

- anonymous

goodluck, keep going! you are almost at your desire answer !

- anonymous

is it D

- skullpatrol

why?

- anonymous

If it is D, then why is it so?

- skullpatrol

You need to do these questions on your own during the test.

- anonymous

Just guessing

- skullpatrol

Stop guessing and start trying to learn how to do it on your own.

- skullpatrol

OpenStudy values the Learning process - not the ‘Give you an answer’ process
- guide the asker to a solution.

- skullpatrol

Learning to "teach yourself" is a skill that no school teaches.

- anonymous

Come on you are almost there! Look here is an example of foil :
if you have for example y=(x-1)(2x-5) then when you foil, then you get this==>
(x)(2x)+(x)(-5)+(-1)(2x)+(-1)(-5) now you try with your problem! Goodluck,the best way to get the answer is to try it! You can post your work and we can help you see if you made any mistakes.

- anonymous

wait i will be right back

- anonymous

Yes we can wait to see your work.

- skullpatrol

Any ideas?

- anonymous

it C i think

- anonymous

hello can i have yes ur right or something

- DebbieG

Can you explain how you got that? Just explain what you did to arrive at that answer... all you need to do is ONE PART of FOIL. I showed you how to FOIL yesterday here:
http://openstudy.com/study#/updates/521dd344e4b0750826e07361
And it was explained again above.

- anonymous

there not the same

- skullpatrol

What is not the same?

- DebbieG

?? The problems?? Of course not. But the way you FOIL is.

- anonymous

what ?

- skullpatrol

Multiply the first terms of the binomials please $$\huge (3x + 1)(3x-2)$$

- anonymous

9x

- DebbieG

almost.

- DebbieG

\(3x\cdot 3x\) = ?

- anonymous

9

- DebbieG

No, you were closer before.

- anonymous

yeah 9x

- skullpatrol

|dw:1377772195150:dw|

- DebbieG

Not 9x.

- DebbieG

\(3x\cdot 3x \neq 9x\)!

- anonymous

yeah

- anonymous

6x

- skullpatrol

|dw:1377772517988:dw|

- DebbieG

what is \(3\cdot 3=?\)
what is \(x\cdot x=?\)

- DebbieG

Did you look at this lesson that I linked for you yesterday?
http://www.coolmath.com/algebra/03-polynomials/06-polynomials-multiplying-foil-01.htm

- anonymous

9x^2

- skullpatrol

$$\Huge \text{Yes}$$

- skullpatrol

Compare that to $$ax^2$$ and answer "what is "a"

- skullpatrol

|dw:1377773010902:dw|

- anonymous

so that is the answer

- skullpatrol

yep

- DebbieG

Although the question is poorly worded. it says "what is the value of the coefficient \(\color {red}{\text{ of }}\) a when clearly, it means "what is the value of the coefficient a".

- anonymous

wait is the answer 9 or 1

- skullpatrol

@harliedanielfrye The answer is 9 because 3*3 = 9.

- anonymous

okay thank you

- skullpatrol

As YOU showed. :D

- DebbieG

Here is another tutorial that would help you with some of what you are struggling with:
http://www.mathsisfun.com/algebra/polynomials-multiplying.html

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