TeX source:
\begin{array}{rclcc} 8x^2-3 &=& -2x & \vert & +2x \cr 8x^2+2x-3 &=& 0 \cr x_{1,2} &=& \dfrac{-2 \pm \sqrt{2^2-4 \cdot 8 \cdot (-3)}}{2 \cdot 8} \cr \cr x_{1,2} &=& \dfrac{-2 \pm \sqrt{4- (-96)}}{16} \cr \cr x_{1,2} &=& \dfrac{-2 \pm \sqrt{100}}{16} \cr \cr x_{1,2} &=& \dfrac{-2 \pm 10}{16} \cr \cr \cr x_1 &=& \dfrac{8}{16} = \dfrac{1}{2} \cr \cr x_2 &=& \dfrac{-12}{16} = -\dfrac{3}{4} \cr \cr \mathbb{L} &=& \left\{-\dfrac{3}{4}; \dfrac{1}{2}\right\} \end{array}