Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Mandy86

  • 3 years ago

Solve the equation in quadratic formula! 2x^2-9x-2=0

  • This Question is Closed
  1. Mandy86
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i got 9\[9\pm \sqrt{65}/4\]

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

    Then \[x = \frac{ -b \pm \sqrt{b ^{2} - 4ac } }{2a}\] Where a = 2 b = -9 c = 2

  3. Mandy86
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i know how to do that i just got confused at the end

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

    \[x = \frac{ 9\pm \sqrt{97}}{4}\]

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

    c = -2 .. sorry my mistake..!

  6. Mandy86
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah it should be \[\sqrt{65}\] not\[\sqrt{97}\]

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

    its \[\sqrt{97}\] since b^2 - 4ac = (-9^2) - (4x 2 x -2) = 81 - (-16) = 97

  8. Mandy86
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ur right i subtracted instead of add. thank you

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

    Ur Welcome..!! (:

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

    So you got the answer?

  11. Mandy86
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes

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

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy