note: Australia's last aircraft carrier fleet was decommissioned in 1982. The current Sydney and Melbourne are guided missile frigates, and the current Albatross is a naval base on land near Nowra[?].
... not 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 ...