1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Finding a,b from roots of equition

  1. Mar 11, 2010 #1
    1. The problem statement, all variables and given/known data

    If x = -1; 1 are the two roots of the equation x^2 +ax+b = 0; then find the values of a and b.

    3. The attempt at a solution


    (x-1) (x+1)= 0 ,,,,,, by expanding

    x^2-1=0 ,,,,, so a=0 , b=-1

    is it right or the question is asking for something eles,,,, ?
  2. jcsd
  3. Mar 11, 2010 #2
    look slike you got it.
  4. Mar 11, 2010 #3
    yay ,,,

    look like am getting better everyday ^^

    thx to this forums
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook