A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Preetha

  • one year ago

What is the best way to solve this quadratic: x2 + 3x – 4 = 0

  • This Question is Closed
  1. Preetha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    @ganeshie8

  2. AlexandervonHumboldt2
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    hmm it looks like only quadratic formula is the best way

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

    Well I guess it would be best first to check with the discriminant :P

  4. mathmate
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    I suggest factoring.

  5. AlexandervonHumboldt2
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    yeah

  6. ganeshie8
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 8

    quadratic formula ofcourse! |dw:1444068957844:dw|

  7. AlexandervonHumboldt2
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    lets listen to ganishe

  8. just_one_last_goodbye
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    WAIT!!! let me have a try please ^_^

  9. AlexandervonHumboldt2
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    yeah preetha substitute the values using the quadratic formula solve the equation

  10. just_one_last_goodbye
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    x2 + 3x – 4 = 0 Refine: 5x - 4 = 0 Add 4 to both sides: 5x - 4 + 4 = 0 + 4 5x=4 Divide both sides by 5: \[\frac{ 5x }{ 5 } = \frac{ 4 }{ 5 } \] Answer: \[x = \frac{ 4 }{ 5 }\]

  11. AlexandervonHumboldt2
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    The quadratic formula is (-b+-sqrt(b^2 - 4ac))/2a where ax^2+bx+c=0 a=1 b=3 c=-4 substitute values and solve;

  12. AlexandervonHumboldt2
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    @just_one_last_goodbye you gave an answer lol coc lol

  13. just_one_last_goodbye
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Pfft I gave the answer why? because c;' I know @Preetha is very smart to already know the answer

  14. Preetha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    That is fine, I do have a couple of strategies now to use. And I do understand this. Thanks all for jumping in.

  15. AlexandervonHumboldt2
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    yeahhhhh i know k jk

  16. imqwerty
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    best way is to use common sense :) we can easily see that x=1 is a root and sum of roots is -b/a =3 so 1 root is1 another will be 3-1=2

  17. Preetha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Its actually fascinating how you all have different strategies to solve this - that is very good to know.

  18. just_one_last_goodbye
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    No problem Mrs. Ram ^-^ Do I get at least 5 owl bucks? I always wanted to know what it would look like on my account

  19. imqwerty
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    (:

  20. just_one_last_goodbye
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ~sigh~ . - .

  21. just_one_last_goodbye
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    WEE THE OWL BUCKS ;-; omg... thank you so much <3 I love u guys so much...

  22. imqwerty
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    oops i did a silly mistake sum of roots ==> -b/a=-3 and one root is 1 so other root is -4

  23. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    it's \[\huge\rm x^2+3x-4=0\] x squared not 2x+3x :=) `squared` that's what makes it quadratic :=) just_one_last :=)

  24. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    as suggested above factoring would be great and AC (headphone :P ) method the best!

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

    Preetha is asking a question!!!??? OMG! The world is ending!!!

  26. Jaynator495
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1444693788595:dw| Click the sphere.

  27. Jaynator495
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1444693919314:dw| Or click anywhere on this canvas

  28. Jaynator495
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \(\color{#0cbb34}{\text{Originally Posted by}}\) @jinxhead20 Preetha is asking a question!!!??? OMG! The world is ending!!! \(\color{#0cbb34}{\text{End of Quote}}\) not the first time, she can often be found asking questions to take notes on how people answer them :P

  29. TheSmartOne
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Unfortunately, x2 + 3x – 4 = 0 is not a quadratic equation.

  30. 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.