A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

8x2 + 64x = 0

  • This Question is Open
  1. e.mccormick
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 4

    I am guessling that is 8x^2... So, what problem are you having with it?

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

    the answers choices are x=0 ,x=-8 x=0,x=8 x=-8,x=0,x=8 x=8,x=64

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

    @e.mccormick

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

    Yes, and what is giving your trouble? This is a tutoring site...

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

    i dont understand anything at all im lost can you explain ?

  6. e.mccormick
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 4

    When you have something = 0 equations, you need to factor it and then find when the factors would be 0. This is sometimes called the roots, zeros, or x intercepts of a polynomial.

  7. e.mccormick
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 4

    So, if you factor \(8x^2 + 64x\), what do you get?

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

    8x^2

  9. e.mccormick
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 4

    Um, that is the first term, but it is not the factors.

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

    ok , so can you break this down in help me step by step ?

  11. e.mccormick
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 4

    Well, do you know what factoring is?

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

    not a clue

  13. e.mccormick
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 4

    OK, if I say \(a\times b\times c\) then a, b and c are factors. They are multiplied together. Another common use is prime factorization. Like how 15 has the prime factors of 3 and 5. So that polynomeal is the result of multiplying together something. When you un-multiply it, you are factoring it.

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

    x^2 would be the factors ?

  15. e.mccormick
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 4

    No, it would be something like \((x\pm h)(x\pm k)\) where h and k are some constants.

  16. e.mccormick
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 4

    If I multiply out \((x+1)(x-3)\) I get: \(x^2+x-3x-3\) or: \(x^2-2x-3\) So \((x+1)\) and \((x-3)\) are factors of \(x^2-2x-3\). That is why factoring can be called un-multiplying.

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

    ion know i just guessed

  18. e.mccormick
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 4

    One big clue with this one is that each term has x in it. If you factor out the x, what would you get?

  19. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    when someone is helping you, and they ask you a question and you guess, it makes them not want to hep you.

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

    solve your equation step-by-step. 8x2+64x=0 Factor left side of equation. 8x(x+8)=0 Set factors equal to 0. 8x=0 or x+8=0 This should be more than enough clues :)

  21. 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.