a*x^2+x-\( \frac{2}{a} \)=0|:a
x^2+ \( \frac{x}{a} \) = \( \frac{2}{a^2} \)
(x+ \( \frac{1}{2a} \) )^2= \( \frac{2}{a^2} \)+\( \frac{1}{4a^2} \)=\( \frac{9}{4a^2} \)|\( \sqrt{} \)
x₁= -\( \frac{1}{2a} \)+\( \frac{3}{2a} \)=\( \frac{1}{a} \)
x₂= -\( \frac{1}{2a} \)-\( \frac{3}{2a} \) = -\( \frac{2}{a} \)