Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

sapphers

  • one year ago

(sqrt2x+13) - 15 = x

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

    Add 15 to both sides and then square both sides.

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

    I'm still kind of confused

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

    Did you add 15 to both sides?

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

    Yeah, I did.

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

    What did you get?

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

    \[\sqrt{2x+13} = x + 15\]

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

    What do you get if you square the left side?

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

    \[(\sqrt{2x=13})^2= ?\]

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

    Sorry. I meant + 13 not =

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

    \[\large{\sqrt{2x+13}-15=x}\]\[\large{\sqrt{2x+13}=x+15}\]Now squaring both sides we get\[\large{2x+13=x^2+225+30x}\]

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

    You must not square each side. So now it will look like this: \[(\sqrt{2x+13})^2=(x+15)^2\]

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

    ok. Too many cooks. Good bye

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

    bye :)

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

    Thanks for leaving I guess... @Mertsj @TheViper are you leaving too or saying goodbye to the other guy?

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

    no

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

    Okay haha

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

    \[\large{2x+13=x^2+225+30x}\]\[\large{\implies x^2+30x-2x+225-13=0}\]\[\large{\implies x^2+28x+212=0}\]Now solve it by factoring :)

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

    You two were both telling me different things. How do I know that yours it right?

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

    We are telling same but concentrate on mine because I m here to help you :)

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

    It won't factor. You'll have to use the quadratic formula.

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

    I tried factoring and it didn't work. So I plug x^2 + 28x + 212 into the quadratic formula?

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

    yes

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

    yup :)

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

    I think it should be \(-14+2i\) \(\&\) \(-14-2i\)

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

    Check ur calculation again :)

  26. 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.