Aust-Agder is a county in Norway, bordering Telemark, Rogaland and Vest-Agder. In 2002 there were 102,945 inhabitants, which is 2.2% of the total population in Norway. Its area is 9,212 km². The county administration is in Arendal.
... 2. (In a field of characteristic 2, the element 2a is zero and it is impossible to divide by it.)
The symbol
<math>\pm \sqrt {b^2-4ac}</math>
in the ...