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

magepker728

x^2-6=0 why isnt it (x+2) (x-3)=0 just need to know why

  • one year ago
  • one year ago

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

    because 3*3=9 and not 6

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

    x^2-9 = x^2-3^2 = (x+3)(x-3)

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

    x^2-6 = x^2-9+3 = (x+3)(x-3)+3

    • one year ago
  4. magepker728
    Best Response
    You've already chosen the best response.
    Medals 0

    typo its suppose to be (x-3) (x+2)

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

    ohh, (x-3)(x+2) = x^2 -3x+2x -6 =x^2 -x -6 and not x^2 -6

    • one year ago
  6. magepker728
    Best Response
    You've already chosen the best response.
    Medals 0

    if factored is it (x-3) (x+2) or square root +-6?

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

    roots are \(\large \pm \sqrt6\) factors are \((x+\sqrt6)(x-\sqrt6) \)

    • one year ago
  8. magepker728
    Best Response
    You've already chosen the best response.
    Medals 0

    but it is not (x-3) (x+2)

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

    exatly! its not because (x-3)(x+2) = x^2-x-6

    • one year ago
  10. magepker728
    Best Response
    You've already chosen the best response.
    Medals 0

    ooh i see

    • one year ago
  11. akash809
    Best Response
    You've already chosen the best response.
    Medals 0

    (x-3) (x-2)= x^2-2x-3x+6=x^2-5x+6...so u got an extra 5x

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

    ask if still any doubts.

    • one year ago
  13. magepker728
    Best Response
    You've already chosen the best response.
    Medals 0

    so when ever it is not a perfect square, i have to to take the square root of both side?

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

    You have to take the square root regardless.

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

    whenever ? when its in the form of x^2 - a^2 = 0

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

    then shift a^2 to other side and take square root.

    • one year ago
  17. magepker728
    Best Response
    You've already chosen the best response.
    Medals 0

    k thanks

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

    welcome :)

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

    bcs u hv 1 exttra x :)

    • one year ago
  20. magepker728
    Best Response
    You've already chosen the best response.
    Medals 0

    :D

    • 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.