New South Wales contains 549 separate Protected Areas with a total land area of 4,953,271 hectares (6.18% of the state’s area). 150 of these are National parks, totalling 4,172,308 hectares (5.21% of the state’s area).
... formula expresses the explicit solution(s) x to the quadratic equation
<math>ax^2+bx+c=0</math>
in terms of the coefficients a, b and c, which ar ...