A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

Complete the square: (5/7)x^2+(9/10)x+(-13/70)=0

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

    ax^2+bx+c

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

    do i multiply by 7/5 to get the coefficient of the squared term to be 1?

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

    ax^2+2ab+b^2

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

    Divide everything by 5/7

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

    a=5/7 b=9/10

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

    firstly divide everything by 5/7 x^2 + (63/50)x-(-13/50) = 0 (x+63/100)^2 - 3969/10000 - 13/50 = 0 (x+63/100)^2 = 6569/10000 x = - (63/100)+-sqrt(6569/10000)

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

    then evaluate that .. that should hopefully be right (although i did it in my head, method is sound tho)

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

    looking over my numbers...

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

    got it! just went wrong on one of those huge fractions

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

    you are amazing!

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

    alternatively it is usually better instead of dividing it properly by 5/7, to put it outside a large bracket and leave it there, from start; 5/7[x^2+(63/65)x-(13/50) = 0

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

    forgot end bracket .. but u get the gist

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

    yes, great

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

    ok glad i could help

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

    I really appreciate it!

  16. 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.