anonymous
  • anonymous
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
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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skullpatrol
  • skullpatrol
Any ideas?
anonymous
  • anonymous
Nope
anonymous
  • anonymous
but i think its is B

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More answers

skullpatrol
  • skullpatrol
why?
anonymous
  • anonymous
I think i am not sure
skullpatrol
  • skullpatrol
Use FOIL on $$\huge y = (3x + 1)(3x − 2) $$
anonymous
  • anonymous
wait be right back
anonymous
  • anonymous
well i think it is A
skullpatrol
  • skullpatrol
why?
anonymous
  • anonymous
idk
anonymous
  • anonymous
you should multiply
anonymous
  • anonymous
(3x + 1)(3x − 2) FOIL method
anonymous
  • 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
  • anonymous
so remember the way quadratics are written are in this standard form: y=\[ax^2+bx+c\]
anonymous
  • anonymous
goodluck, keep going! you are almost at your desire answer !
anonymous
  • anonymous
is it D
skullpatrol
  • skullpatrol
why?
anonymous
  • anonymous
If it is D, then why is it so?
skullpatrol
  • skullpatrol
You need to do these questions on your own during the test.
anonymous
  • anonymous
Just guessing
skullpatrol
  • skullpatrol
Stop guessing and start trying to learn how to do it on your own.
skullpatrol
  • skullpatrol
OpenStudy values the Learning process - not the ‘Give you an answer’ process - guide the asker to a solution.
skullpatrol
  • skullpatrol
Learning to "teach yourself" is a skill that no school teaches.
anonymous
  • 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
  • anonymous
wait i will be right back
anonymous
  • anonymous
Yes we can wait to see your work.
skullpatrol
  • skullpatrol
Any ideas?
anonymous
  • anonymous
it C i think
anonymous
  • anonymous
hello can i have yes ur right or something
DebbieG
  • 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
  • anonymous
there not the same
skullpatrol
  • skullpatrol
What is not the same?
DebbieG
  • DebbieG
?? The problems?? Of course not. But the way you FOIL is.
anonymous
  • anonymous
what ?
skullpatrol
  • skullpatrol
Multiply the first terms of the binomials please $$\huge (3x + 1)(3x-2)$$
anonymous
  • anonymous
9x
DebbieG
  • DebbieG
almost.
DebbieG
  • DebbieG
\(3x\cdot 3x\) = ?
anonymous
  • anonymous
9
DebbieG
  • DebbieG
No, you were closer before.
anonymous
  • anonymous
yeah 9x
skullpatrol
  • skullpatrol
|dw:1377772195150:dw|
DebbieG
  • DebbieG
Not 9x.
DebbieG
  • DebbieG
\(3x\cdot 3x \neq 9x\)!
anonymous
  • anonymous
yeah
anonymous
  • anonymous
6x
skullpatrol
  • skullpatrol
|dw:1377772517988:dw|
DebbieG
  • DebbieG
what is \(3\cdot 3=?\) what is \(x\cdot x=?\)
DebbieG
  • 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
  • anonymous
9x^2
skullpatrol
  • skullpatrol
$$\Huge \text{Yes}$$
skullpatrol
  • skullpatrol
Compare that to $$ax^2$$ and answer "what is "a"
skullpatrol
  • skullpatrol
|dw:1377773010902:dw|
anonymous
  • anonymous
so that is the answer
skullpatrol
  • skullpatrol
yep
DebbieG
  • 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
  • anonymous
wait is the answer 9 or 1
skullpatrol
  • skullpatrol
@harliedanielfrye The answer is 9 because 3*3 = 9.
anonymous
  • anonymous
okay thank you
skullpatrol
  • skullpatrol
As YOU showed. :D
DebbieG
  • 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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