Question

determine as raizes reais das equacoes incompletas 25x² - 1 = 0

Answer 1

$25 {x}^{2} - 1 = 0 \\ 25 {x}^{2} = 1 \\ {x}^{2} = \frac{1}{25} \\ x = ± \sqrt{ \frac{1}{25} } \\ x = ±\frac{1}{5}$