TeX Quellcode:
\begin{array}{crcrcrcrl} \text{I} & 16a &+& 4b &+& c &=& 3 \cr \text{II} & 4a &+& 2b &+& c &=& 0 \cr \text{III} & 25a &-& 5b &+& c &=& 5{,}25 \cr \cr \text{I} & 16a &+& 4b &+& c &=& 3 \cr \text{I-II} & 12a &+& 2b & & &=& 3 \cr \text{I-III} & -9a &+& 9b & & &=& -2{,}25 \cr \cr \text{I} & 16a &+& 4b &+& c &=& 3 \cr \text{II'} & 12a &+& 2b & & &=& 3 \cr \text{3 II'+4 III'} & & & 42b & & &=& 0 & \Rightarrow b = 0 \cr \cr b = 0 \text{ in II'} & 12a &+& 2\cdot 0 & & &=& 3 & \Rightarrow a = \dfrac{1}{4} \cr b = 0 \text{ und } a = \dfrac{1}{4} \text{ in II} & 4\cdot\dfrac{1}{4} &+& 2 \cdot 0 &+& c &=& 0 & \Rightarrow c = -1 \end{array}