Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Ben103

  • 3 years ago

t^2+6t-7. Is their a 2 numbers that equael product -7 and sum 6. Is it just me or thats not possible?

  • This Question is Closed
  1. KingGeorge
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    That's just you :) There are indeed two numbers that multiply to be -7, and add to be 6. Think about it a bit and I'm sure you'll get it.

  2. Ben103
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Well the equation is set up as (a+1) (a-7) thats what I got. but 1-7=-6 so that doesnt work.

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

    remember that - and + in front of the numbers

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

    Wrong way around mate

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

    That's very close.

  6. Ben103
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok got it switched them. Now it works.

  7. KingGeorge
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Excellent!

  8. Ben103
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thanks lol I cant believe i cudnt figure tthat out

  9. KingGeorge
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    No problem. We've all had something obvious pass us by before :P

  10. Ben103
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    would the solution set be written as (a+7) (a-1) or just {7,-1}

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

    are you factorizing? normally it wuold be written as full.

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

    you could always use the quadratic formula \[t=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]

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

    (a+7)(a-1) that is.... you will need to use the full factors to use in equations.

  14. KingGeorge
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    The solution set would be {-7,1}. Note that you have -7 and +1 because if \(a+7=0\), then \(a=-7\). Similarly, \(a-1=0\implies a=1\).

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

    @Ben103 sorry the questions look like what I'm doing at school at the moment which is factorizing :( I could be wrong

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

    @KingGeorge knows more than me i'm sure! lol I'm only doing high school maths

  17. KingGeorge
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    As another tip, if you're asked for a solution SET, your final answer should look like {_,_,_,...,_}. I.e., you have a list of things in the curly brackets.

  18. Ben103
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Ok thanks I understand it now. :)

  19. KingGeorge
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    You're welcome.

  20. 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