Lingewaal (population: 10,663) is a municipality in the eastern Netherlands, in the province of Gelderland. The municipality covers an area of 54.56 km² (of which 3.53 km² water).
The municipality of Lingewaal consists the following towns, villages and townships: Asperen[?], Herwijnen[?], Heukelum[?], Spijk[?], Vuren[?].
... means that the parabola described by the quadratic equation touches the x-axis in a single point.)
If the discriminant is positive, then there are two different solutions ...