Aloha :)
$$\left.2x^2-3=-2x^2+3\quad\right|\;+2x^2$$$$\left.4x^2-3=3\quad\right|\;+3$$$$\left.4x^2=6\quad\right|\;:4$$$$\left.x^2=\frac{6}{4}=\frac{3}{2}\quad\right|\;\sqrt{\cdots}$$$$\left.x=\pm\sqrt{\frac{3}{2}}\quad\right.$$
Die beiden gemeinsamen Punkte sind also \(A\left(-\sqrt{\frac{3}{2}}\;;\;0\right)\) und \(B\left(\sqrt{\frac{3}{2}}\;;\;0\right)\)
~plot~ 2x^2-3 ; -2x^2+3 ~plot~