A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

For what values of y does y^2-2y=48? Show all work.

  • This Question is Closed
  1. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    -6 and 8

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

    How did you get that?

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

    he is super fast that is how. plus wolfram

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

    \[y^2-2y-48=0\] \[(y+6)(y-8)=0\]

  5. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    sometimes I feel like working it out; others times not lol

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

    \[y+6=0\] \[y=-6\] \[y-8=0\] \[y=8\]

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

    method two \[y^2-2y=48\] \[(y-1)^2=48+1=49\] \[y-1=7\] or \[y-1=-7\] \[y = 8\] or \[y=-6\]

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

    pfft super fast , anyone thats been doing maths for like 4yrs should be able to solve a quadratic like that in about 30seconds

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

    its even monic which makes it even easier!

  10. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    28.6875378583032847459504348475... secs lol

  11. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    30 seconds is for my grandma ;)

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

    i still cannot factor to save my life. prefer to find the zeros

  13. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the factors are just the zeros in reverse; if x = -3, 5 are roots then (x+3)(x-5) are the factors

  14. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    maybe should ammend that to have a constant of variation, but you know lol

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

    of course and so to factor i find the zeros. it is easier for me to do it that way

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

    Satelite, thanks for the tip about wolfram. It calculated the answer to "life, the universe, and everything" super-fast !

  17. 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.