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

mathtard

Determine the nature of solutions of the equation x^2-3x+8=0

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. fiddlearound
    Best Response
    You've already chosen the best response.
    Medals 0

    you need to check the discriminant - know what that is ?

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

    no

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

    are you familiar with the quadratic equation ?

    • 2 years ago
  4. mathballet8888
    Best Response
    You've already chosen the best response.
    Medals 2

    use quadratic formula

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

    no not at all.

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

    ever seen this formula ? \[x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}\]

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

    http://en.wikipedia.org/wiki/Quadratic_equation

    • 2 years ago
  8. mathballet8888
    Best Response
    You've already chosen the best response.
    Medals 2

    \[(-b \pm \sqrt{b^{2}-4ac})/2a\]

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

    In general: ax^2+bx+c=0 In your case: a=1 (the coefficient of x^2) b=-3 (coefficient of x) c=8 Use these values and plug them into the discriminant (the thingy inside the square root). \[\Delta=b^2-4ac\] If the discriminant = 0, there is one real solution If the discriminant > 0, there are two real solutions If the discriminant < 0, there are no real solutions

    • 2 years 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.