TeX Quellcode:

\begin{array}{rcl}g\left(x_1\right) &=& g\left(\dfrac{4}{5}\right) \cr&=& -9\cdot\left(\dfrac{4}{5}\right)^2+8\cdot\dfrac{4}{5}-1\cr&=& -\dfrac{9}{25} \cr\cr g\left(x_2\right) &=& g\left(-10\right) \cr&=& -9\cdot\left(-10\right)^2+8\cdot\left(-10\right)-1\cr&=& -981\end{array}