SOLUTION: Where does the quadratic fromula come from? -b plus or minus the square root of b squared minus 4ac all divided by 2a

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Where does the quadratic fromula come from? -b plus or minus the square root of b squared minus 4ac all divided by 2a      Log On


   

Question 496280: Where does the quadratic fromula come from?
-b plus or minus the square root of b squared minus 4ac all divided by 2a
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Factor out a and complete the square:







Take the square root of both sides and solve for x.