Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

apple_pi Group Title

Factor: x^4-2x^3+x^2+8x-5 Try it manually...how is it done?

  • one year ago
  • one year ago

  • This Question is Closed
  1. ParthKohli Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Use the rational roots test?

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

    try it

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

    Okay. The possible rational roots are: 5 -5 1 -1

    • one year ago
  4. ParthKohli Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Checking all of them. Gimme a sec.

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

    forget 1,-1

    • one year ago
  6. ParthKohli Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Yup, not 1 and -1.

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

    not 5.

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

    no rational roots

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

    yeah, but it can still be factorised

    • one year ago
  10. Algebraic! Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    into two quadratics... what's the point here?

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

    Well...you're factoring it I guess you could get the roots But how do you get to the quadratics?

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

    Yeah, we can.

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

    i may suggest a way, (x^2+ax+b)(x^2+cx+d) = x^4-2x^3+x^2+8x-5 and compare the co-efficients, 4 unknowns

    • one year ago
  14. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    like bd=-5

    • one year ago
  15. ParthKohli Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Like for example, we have \(\sqrt2{}\) as a root, then a factor would be \(\rm x^2 - 2\).

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

    Well, @hartnn 's way is very good to get the quadratics

    • one year ago
    • Attachments:

See more questions >>>

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.