Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

FreeTrader

  • 3 years ago

Can you help me see where I am stuck finding the zeros of this quadratic equation?

  • This Question is Closed
  1. FreeTrader
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[3x^2 - 12x + 11 = 0\]

  2. satellite73
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    quadratic formula for this one use \[x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\] with \[a=3,b=-12,c=11\]

  3. FreeTrader
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    My student solutions manual says I should obtain \[(6 \pm \sqrt{3}) \div 3\]

  4. satellite73
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    indeed you should

  5. FreeTrader
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Let's walk through this, so I can see where I am tripping over my shoelaces.

  6. satellite73
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    first you get \[\frac{-12\pm\sqrt{(-12)^2-4\times 3\times 11}}{6}\]

  7. FreeTrader
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Wait a sec. I see that I made an error in the first term under the radical. I will go back to the drawing board and re-attempt this one on my own.

  8. FreeTrader
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    By the way, how are you producing the nice looking divisor line?

  9. satellite73
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \frac{a}{b} looks like \[\frac{a}{b}\]

  10. FreeTrader
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Got it. I made simple mistakes in my substitutions, then got hung up on trying to do algebra with unduly complicated figures.

  11. FreeTrader
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    THANKS @satellite73, you got me unstuck!

  12. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.