Vest-Agder is a county in Norway, bordering Rogaland and Aust-Agder. In 2002 there were 157,851 inhabitants, which is 3.4% of the total population in Norway. Its area is 7,281 km². The county administration is in Kristiansand.
... solution(s) x to the quadratic equation
<math>ax^2+bx+c=0</math>
in terms of the coefficients a, b and c, which are assumed to be real (but see below ...