wortel

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1.2b

$ \begin{equation} \begin{split} a& =b+c-d\\ & \quad +e-f\\ & =g+h\\ & =i \end{split} \end{equation} $

$(-\frac{1}{3} \cdot \sqrt{6} \cdot i ) ^ 2$ $-\frac{1^2}{3^2} \cdot 6 \cdot i^2 $ $\frac{1}{9} \cdot 6 \cdot -1 $ $\frac{6}{9} \cdot -1 $ $\frac{2}{3} \cdot -1 $ $-\frac{2}{3} $