East Lothian is one of 32 unitary council regions in Scotland. It borders onto City of Edinburgh, Scottish Borders and Midlothian. Its administrative capital is Haddington, and its large town is Musselburgh.
... 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 understood as "either of ...