A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Find a cubic function with the given zeros. Square root of seven., -Square root of seven., -4

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

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

    putting all of our zeros together, we get: f(x) = (x+sqrt7)(x-sqrt7)(x+4) all you need to do is expand that by multiplying everything out

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

    but how

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

    start with (x+sqrt7)(x-sqrt7) then use the difference if squares formula (x+A)(x-A) = x^2-A^2

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

    x^2-sqrt7^2 x^2-7

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

    right?

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

    good, now we tack on (x+4) (x^2-7)*(x+4) use foil to expand that

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

    x^3+4x^2-7x-28

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

    like that right?

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

    excellent! now take a look at your answer choices and see which one matches

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

    thank you

  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

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.