$6x^2-11x-10=0$
$a=6$, $b=-11$ en $c=-10$
$D=(-11)^2-4·6·-10=121+240=361$
$\eqalign{x=\frac{11-\sqrt{361}}{2·6}}$ of $\eqalign{x=\frac{11+\sqrt{361}}{2·6}}$
$\eqalign{x=\frac{11-19}{12}}$ of $\eqalign{x=\frac{11+19}{12}}$
$\eqalign{x=\frac{-8}{12}}$ of $\eqalign{x=\frac{30}{12}}$
$\eqalign{x=-\frac{2}{3}}$ of $\eqalign{x=2\frac{1}{2}}$
