anonymous
  • anonymous
Decide which part of the quadratic formula tells you whether the quadratic equation can be solved by factoring. −b b2 − 4ac 2a Use the part of the quadratic formula that you chose above and find its value, given the following quadratic equation: 2x2 + 7x + 3 = 0
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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pooja195
  • pooja195
\(b^2-4ac\) is called 'Discriminant' which decides that whether the the quadratic equation can be solved by factoring.
anonymous
  • anonymous
I know that
pooja195
  • pooja195
So you need help factoring?

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anonymous
  • anonymous
Basically
pooja195
  • pooja195
Well what numbers multiply to make 6 but add to make 7?
anonymous
  • anonymous
6 and 1
anwaarullah
  • anwaarullah
2x^+6x+x+3=0
pooja195
  • pooja195
ok now you have (2x+6 )(2x+1) Can you divide both of these by a GCF?
pooja195
  • pooja195
What number can we divide 2 and 6 by?
anonymous
  • anonymous
2
anwaarullah
  • anwaarullah
take common
pooja195
  • pooja195
You cant simpyfy anything more so you have 2x+3=0 2x+1=0 solve both for x
anwaarullah
  • anwaarullah
|dw:1442766320422:dw| solve more
anonymous
  • anonymous
x=-3/2 and x=-1/2
pooja195
  • pooja195
-1/2 is right the other one is incorrect
anwaarullah
  • anwaarullah
x+3=0 ?????
pooja195
  • pooja195
@anwaarullah its my mistake i wrote it wrong.
pooja195
  • pooja195
\(\color{#0cbb34}{\text{Originally Posted by}}\) @pooja195 You cant simpyfy anything more so you have 2x+3=0 2x+1=0 solve both for x \(\color{#0cbb34}{\text{End of Quote}}\) it shouldve been x+3=0
anonymous
  • anonymous
x=-3
anonymous
  • anonymous
for the questions, numerical answers are expected sorry forgot to say that
pooja195
  • pooja195
Good \[ x+3=0:\quad x=-3\] \[2x+1=0:\quad x=-\frac{1}{2} \]
pooja195
  • pooja195
This is numerical
anonymous
  • anonymous
supposedly for this, one answer is needed
pooja195
  • pooja195
oh ok i see what they wanted
pooja195
  • pooja195
we need to set this equal to y since we are solviing using the discernment \[\huge~\rm~y=2x^2+7x+3 \]
pooja195
  • pooja195
\[\huge~\rm~~discriminant=b^2−4(a)(c) \]
pooja195
  • pooja195
\[\huge~\rm~7^2−4(2)(3) =? \]
anonymous
  • anonymous
25
pooja195
  • pooja195
Yep there we go :)
anonymous
  • anonymous
that is what i had from the beginning just wasn't sure
pooja195
  • pooja195
ah ok sorry for making things more complicated than they needed to be!
anonymous
  • anonymous
its fine
pooja195
  • pooja195
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anonymous
  • anonymous
:) thanks
pooja195
  • pooja195
:)

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