Quadratic equation calculator

Quadratic equation has the basic form:
ax2+bx+c=0

eq2
Enter the coefficients a, b, c of quadratic equation in 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:

-1.25z2-4z+21=0 ... quadratic equation

Discriminant:
D = b2 - 4ac = 121
D>0 ... The equation has two distinct real roots

z1 = 2.8
z2 = -6

P = {2.8; -6}