A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

Use the quadartic formula to solve the equation below. 2x^2+13x=4

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

    Do you mean quadratic? Use the formula and plug in the coeff of the x^2 for a, the coeff of the x term for b and the coeff of the constant term for c. 2x^2+13x=4 ---> 2x^2+13x-4 2x^2--->a=2 13x------>b=13 -4---->c=-4

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

    -b + or - sqrt(b^2-4ac) all divided by 2a

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

    Hold on i have chocies

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

    it would be better to say plus and minus, you get two answers

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

    they should both work as solutions to the equation

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

    If you're doing homework they probably want both answers.

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

    A.) x= 13+√201 -------------- 2 B.)x=-13+√177 ---------------- 4 C.) x= -13+√ 201 ---------------- 2 D.) x= -13 +√ 201 ----------- 4

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

    AND + HAS a line under it \[\pm\]

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

    Close, not quite.

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

    substitute your values in the quadratic formula and see which is the correct one.

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

    B?

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

    what's the difference between C and D

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

    no.

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

    c has a 2 and d has a 4

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

    Well the answer is exactly the same as D, only it's + and - sqrt201

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

    katie, there is no point guessing the answer. take some time and substitute your vlues into the quadratic equation. that will give you the correct answer.

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

    so its D?

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

    If the + is a + - line thing, yes

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

    ±

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

    yes it has this \[\pm\] under it so its D

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

    Yeah, i mean it's exactly the same as the formula, it just matters that you plug in the right numbers.

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

    okay thanks

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

    np

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

    Check your work on http://www.wolframalpha.com/input/?i=2x^2%2B13x%3D4+quadratic+formula

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

    I've gotta go, goodluck

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

    Thanks

  27. 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

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.