SOLUTION: Hi. I have a question about the standard quadratic equation (ax^2+ bx+c). I have seen that in textbooks, they derived -b/2a from ax^2+bx+c and I was wondering how they got that. Th

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: Hi. I have a question about the standard quadratic equation (ax^2+ bx+c). I have seen that in textbooks, they derived -b/2a from ax^2+bx+c and I was wondering how they got that. Th      Log On


   

Question 55087: Hi. I have a question about the standard quadratic equation (ax^2+ bx+c). I have seen that in textbooks, they derived -b/2a from ax^2+bx+c and I was wondering how they got that. Thank you for your help and time.
Answer by anjulasahay(30) About Me  (Show Source):
You can put this solution on YOUR website!
Hi. I have a question about the standard quadratic equation (ax^2+ bx+c). I have seen that in textbooks, they derived -b/2a from ax^2+bx+c and I was wondering how they got that. Thank you for your help and time.
ans:
the solution of a quadratic eq is given
x = (-b+-sqrt(b^2-4ac))/2a
if b^2 = 4ac
then x = -b/2a