TeX Quellcode:

\begin{array}{rcl} f(x) &=& -11x^2-44x-34 \cr &=& -11 \left(x^2+4x+\dfrac{34}{11} \right) \cr &=& -11 \left(x^2+2 \cdot 2x +4- \dfrac{10}{11} \right) \cr &=& -11 \left(x^2+2 \cdot 2x +2^2- \dfrac{10}{11} \right) \cr &=& -11 \left((x+2)^2- \dfrac{10}{11} \right) \cr &=& -11(x+2)^2+10 \end{array}