quadratic formula

  • It gives solution of a quadratic equation x1,2=−b±b2−4ac2a. x_{1,2} = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}.
  • Values of aa, bb, cc are from quadratic equation.
  • There might be no real-number solutions.
Elizabeth Stapel, "The Quadratic Formula Explained", Purplemath, 1 Oct 1999 (), url https://www.purplemath.com/modules/quadform.htm [20241222].