Moray is one of 32 unitary council regions in Scotland. It is in the north east of the country and borders onto the regions of Aberdeenshire and Highland. It incorporates the former counties of Nairnshire, Morayshire and Banffshire.
... 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 formula should be ...