Question

resolva a seguinte equação do segundo grau : -2x² + 1 = 0

Answer 1

$Resolu\c{c}\~ao \to \left\{\begin{array}{ccc}-2x^2+1=0\\\\-2x^2 = -1\\\\2x^2 = 1\\\\x^2 = \frac{1}{2}\\\\x =\pm \sqrt{\frac{1}{2}}\\\\x = \pm\frac{1}{\sqrt{2}}\\\\x =\pm \frac{\sqrt{2}}{2}\end{array}\right$

Espero ter ajudado. =^.^=