Quadratic equation calculator

Quadratic equation has the basic form: ax2+bx+c=0
eq2
Enter the quadratic equation's coefficients a, b, and c of its basic standardized form. A solution of quadratic equations is usually two different real or complex roots or one double root — the calculation using the discriminant.


Calculation:


Solution in text:

-2a2+82a-840=0 ... quadratic equation

Discriminant:
D = b2 - 4ac = 4
D > 0 ... The equation has two distinct real roots

a1 = 21
a2 = 20

P = {21; 20}