Réitigh do x. (complex solution)
x=\frac{Ah^{2}}{690}
\left(c=d\text{ and }a=d\text{ and }b=d\text{ and }h=A^{-\frac{1}{2}}\sqrt{690d}\text{ and }d\neq 0\text{ and }A\neq 0\right)\text{ or }\left(c=d\text{ and }a=d\text{ and }b=d\text{ and }h=-A^{-\frac{1}{2}}\sqrt{690d}\text{ and }d\neq 0\text{ and }A\neq 0\right)\text{ or }\left(c=0\text{ and }d=0\text{ and }b=0\text{ and }h\neq 0\text{ and }a=0\text{ and }A=0\right)
Réitigh do x.
x=\frac{Ah^{2}}{690}
\left(c=0\text{ and }d=0\text{ and }b=0\text{ and }h\neq 0\text{ and }a=0\text{ and }A=0\right)\text{ or }\left(h\neq 0\text{ and }c=d\text{ and }a=d\text{ and }b=d\text{ and }A<0\text{ and }d<0\text{ and }|h|=\sqrt{\frac{690d}{A}}\right)\text{ or }\left(h\neq 0\text{ and }c=d\text{ and }a=d\text{ and }b=d\text{ and }A>0\text{ and }d>0\text{ and }|h|=\sqrt{\frac{690d}{A}}\right)
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