< User:G from B
Abercrombie River is a national park in New South Wales (Australia), 138 km west of Sydney.
See also: Protected areas of New South Wales (Australia)
... so we add the square of b/(2a) to both sides, getting <math>x^2+\frac{b}{a}x+\frac{b^2}{4a^2}=-\frac{c}{a}+\frac{b^2}{4a^2}.</math> The left side is ...