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

ThisShouldFeelLikeFire

How exactly do I solve this equation? x2 - 12x = -36

  • one year ago
  • one year ago

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

    \[x^2-12x+36=0\] now solve the quadratic

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

    gives x=6 can yuo see why

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

    you can use the quadratic formula or you can factor it you can also, look at its graph and see where it crosses the x axis

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

    here yuo can factor the eqn, Do you know how to do this?

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

    I don't understand how you got x = 6...

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

    |dw:1338677027789:dw|

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

    |dw:1338677062779:dw|

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

    I'm sorry... I'm so confused. /:

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

    Oh! Wait I think I get it!!

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

    Took me a little bit :P Thank you both a ton!!

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

    if you factorise the equation you get (x-6)(x-6) so when (x-6)=0 x=6 Do you see

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

    Here is how I practice factorising write the factorised end point i.e. (x+3)x+4) and expand the brackets to give\[x^2+4x+3x+12 \rightarrow x^2+7x+12\] now |I take \[x^2+7x+12\] and work backwards because I know it will definitely factorise

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

    |dw:1338678477379:dw|

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

    |dw:1338678551861:dw|

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

    wow that's the hard way! but it does always work. Try to factorise it before going through all this stress

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

    just presenting multiple ways to solve it. Quadratic formula works 100% of the time, factoring does not

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

    that's what I said :P

    • 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.