TeX Quellcode:

\begin{array}{lcrcrcrcr} f(0) &=& a\cdot 0^2 &+& b\cdot 0 &+& c &=& 0 \cr f\left(\dfrac{1}{3}\right) &=& a\cdot \left(\dfrac{1}{3}\right)^2 &+& b\cdot \dfrac{1}{3} &+& c &=& -\dfrac{1}{3} \cr f\left(\dfrac{2}{3}\right) &=& a\cdot \left(\dfrac{2}{3}\right)^2 &+& b\cdot \dfrac{2}{3} &+& c &=& 0 \end{array}