Question

2x ao quadrado menos 62 igual a zero

Answer 1

$2x^2-62 =0 \\ \\ 2x^2=62 \\ \\ x^2= \frac{62}{2} \\ \\ x^2=31 \\ \\ x_{1} = \sqrt{31} \\ \\ x_{2} =- \sqrt{31}$

Answer 2

2x² - 62 = 0
2x² = 62
x² = 62/2 
x² = 31
x = ±√31   ou   x ≈ ± 5,5


S = { - √31 ; √31}