Lös ut b (complex solution)
\left\{\begin{matrix}b=\frac{-\sqrt{a\left(ax^{2}-324x+324a\right)}-ax}{18}\text{, }&\left(arg(a^{2})<\pi \text{ or }x\neq a\right)\text{ and }a\neq 0\\b=\frac{\sqrt{a\left(ax^{2}-324x+324a\right)}-ax}{18}\text{, }&x\neq a\text{ and }a\neq 0\end{matrix}\right,
Lös ut a
a=\frac{-\sqrt{18bx^{2}+81x^{2}+\left(bx\right)^{2}+324b^{2}}+bx+9x}{18}
a=\frac{\sqrt{18bx^{2}+81x^{2}+\left(bx\right)^{2}+324b^{2}}+bx+9x}{18}\text{, }b\neq 0
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