Question

Considere a função f(x) = 2x² - 16, calcule a f(x) = 0

Answer 1

$2 {x}^{2} - 16 = 0 \\ 2 {x}^{2} = 16 \\ 2x = \sqrt{16 } \\ 2x = 4 \\ x = \frac{4}{2} \\ x = 2$