SOLUTION: 2. If x=3 or -4 are the solution of the equation x^2+ax+b=0, find the values of a and b?

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: 2. If x=3 or -4 are the solution of the equation x^2+ax+b=0, find the values of a and b?      Log On


   

Question 393224: 2. If x=3 or -4 are the solution of the equation x^2+ax+b=0, find the values of a and b?
Answer by ptaylor(2198) About Me  (Show Source):
You can put this solution on YOUR website!
Then we have:
(x-3)(x+4)=0 expand using FOIL
x^2+x-12=0 Now this quadratic has to be identical to x^2+ax+b, so:
a=1
b=-12
Hope this helps---ptaylor