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

sdahar

how do you find the root of this equation, 2x squared-x-15=0

  • one year ago
  • one year ago

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

    @sdahar hi:) \(\huge \color{red}{\text{Welcome to Open Study}}\ddot\smile\) do you know how to solve quadratic equations ?

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

    using factorization ?

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

    i really need help with slopes and how to find them in equations

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

    your original question needs to find roots, right ? can you factorize that quadratic by splitting the middle term ?

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

    you can factorise it... or use the general quadratic formula. here is a fail safe method for factorising for a quadractic \[ax^2 + bx + c = 0\] multiply a and c in your question 2 x -15 = -30 find the factors of -30 that add to -1...... -6 and 5 then set up the solution in this manner (ax + factor 1)(ax + factor2) (2x - 6)(2x +5) ------------------------- =0 -------------- = 0 a 2 remove any common factors from the binomials 2(x - 3)(2x + 5) -------------- =0 2 and wow there is a common factor that cancels... and leaves you with a factorised quadratic. and allow you to find the zeros.

    • 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.