Question

2X²+1-3=0 resolva a equação

Answer 1

2x² + 1 - 3 = 0
2x² - 2 = 0
2x² = 2
x² = 2/2
x² = 1
x = ±√1
x = ±1

Answer 2

$2 {x}^{2} + 1 - 3 = 0 \\ 2 {x}^{2} = 0 - 1 + 3 \\ 2 {x}^{2} = 2 \\ {x}^{2} = \frac{2}{2} \\ {x}^{2} = 1 \\ x = \pm \sqrt{1} \\ x = \pm \: 1$

$S = \{ - 1, + 1 \}$