Quadratic Equation Calculator This is a free mathematical calculator to solve quadratic equations. The app is able to find real and complex roots. ax²+bx+c=0 just enter coefficients of a,b and c. Helps teacher and student in Mathematics algebra education. quadratic formula calculator find roots of quadratic equation quadratic equation by completing the square solver solving quadratic equations by extracting square roots useful in physics, engineering, economics, biology and many other sci