anonymous
  • anonymous
Solve 3x2 + 4x = 2.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
I will fan and medal
anonymous
  • anonymous
Is the 3x squared? is it 3x^2+4x=2
anonymous
  • anonymous
yes

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More answers

anonymous
  • anonymous
Does it tell you how it wants it solved? Like a specific way?
anonymous
  • anonymous
the quadratic formula
anonymous
  • anonymous
do you know the formula by heart?
anonymous
  • anonymous
x=-b+/- sqrt b^2 -4(a)(c) all over 2(a)
anonymous
  • anonymous
yes
anonymous
  • anonymous
Ok so first you need to set your equation equal to zero
anonymous
  • anonymous
3x2+4x-2=0
anonymous
  • anonymous
good. Now do you know your values for a, b, and c?
anonymous
  • anonymous
Plug them into the equation?
anonymous
  • anonymous
Yes
anonymous
  • anonymous
(-3 \[\pm \sqrt{16 +24}) / 6\]
anonymous
  • anonymous
the two lines are in continuation
anonymous
  • anonymous
It should look like x=-4\[\pm \sqrt{4^2-4(3)(-2)}\] over 2(3)
anonymous
  • anonymous
So would it be -2 plus radical 10 all over 3|dw:1434907050388:dw|
anonymous
  • anonymous
How did you get that?
anonymous
  • anonymous
\[-4+\sqrt{}\]40
anonymous
  • anonymous
\[x=-4\pm \sqrt{16+24} \over 6\]
anonymous
  • anonymous
-4 plus or negative radical 40 all over 6
anonymous
  • anonymous
yes
anonymous
  • anonymous
Yes. then I simplifed
anonymous
  • anonymous
a=3; not 4
anonymous
  • anonymous
was I right?
anonymous
  • anonymous
I used a=3
anonymous
  • anonymous
What did you simplify to?
anonymous
  • anonymous
-2 plus/negative radical 10/3
anonymous
  • anonymous
|dw:1434907346795:dw|
anonymous
  • anonymous
How did you get there?
anonymous
  • anonymous
no uhmwhat... u wrote -4 in two consecutive comments
anonymous
  • anonymous
Where?
anonymous
  • anonymous
guys? Was I right??
anonymous
  • anonymous
let me check
anonymous
  • anonymous
your answer should be \[x=-4\pm2\sqrt{10} \over 6\]
anonymous
  • anonymous
That's not an answer choice
anonymous
  • anonymous
sorry... u r correct
anonymous
  • anonymous
When you take the sqrt of 40 you find two radicals that multiply to give you 40 (sqrt 4 and sqrt 10) the sqrt of 4 is 2 but the 2 is attached to the sqrt of 10 so you cannot do -4=/- 2
anonymous
  • anonymous
What are your answer choices
anonymous
  • anonymous
I pointed out something I thought was wrong
anonymous
  • anonymous
|dw:1434907656687:dw|
anonymous
  • anonymous
|dw:1434907713281:dw|
anonymous
  • anonymous
|dw:1434907746508:dw|
anonymous
  • anonymous
I think what the answers did was simplify further. It makes sense in theory of what they did. Personally I don't simplify further because it doesn't give you as accurate a graph but if that is what the test or questions want then yes you are correct
anonymous
  • anonymous
|dw:1434907790626:dw|

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