Question

Equação de 2º grau

25y² - 1 = 0

Answer 1

$25y^2 - 1 = 0\\\\25y^2 = 1\\\\y^2 = \frac{1}{25} \\\\y= \sqrt{ \frac{1}{25} } \\\\\boxed{y'= \frac{1}{5} }\\\\\boxed{y''= -\frac{1}{5}}$