A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Solve: x2 + 2x - 1 = 0

  • This Question is Closed
  1. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i'm pretty sure you know how to factor that :-

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

    That can't be factored, honestly.

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

    i got \[-2\pm \sqrt{8}> divided by 2\]

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

    oh wait

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

    Looks alright to me. You can write that as \(-1 \pm \sqrt 2\)

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

    factor 8

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

    square root of 8 is a long decimal

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

    \[x^2+2x=1,add~1 ~\to~both~sides\]

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

    \[\sqrt 8 = 2 \sqrt 2\]

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

    \[\huge\rm \frac{ -2 \pm \sqrt{4 \times 2}}{ 2}\] yep right that's why you to factor 8 4 times 2 =8 now take square root of 4

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

    have**

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

    thats what i got, but what next?

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

    Then you've solved it.

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

    1 + √2 and -1 - √2 -1 + √2 and -1 - √2 -1 + √3 and -1 + √2 -1 - √2 and 1 + √2

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

    \[\huge\rm \frac{ -2 \pm 2\sqrt{ \times 2}}{ 2}\] 2 is common so take it out

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

    oh

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

    so,..|dw:1433904972339:dw|

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

    i will fan all of u if you help me with 3 questions

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

    is that it?

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

    \[x^2+2x+1=2,(x+1)^2=2,x+1=\pm \sqrt{2}\] \[x=-1\pm \sqrt{2}\]

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

    so i am right

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

    \[\large\rm \frac{ \cancel 2(-1 \pm \sqrt{ 2})}{ \cancel2}\] yes you got it right!

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

    |dw:1433908590016:dw|

  24. 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.