Question

b) f(x) = x² + 2 x - 3 5 = 0

Answer 1

Resposta: x1 = 5 e x2 = -7

Explicação passo a passo:

x² + 2x - 35 = 0

Delta = b² - 4ac

Delta = 2² - 4.1.-35

Delta = 4 + (4.35)

Delta = 4 + 140

Delta = 144

$\sqrt{Delta} = 12$

$x1 = \frac{-b + \sqrt{Delta}}{2a}$

$x1 = \frac{-2 + 12}{2}$

$x1 = \frac{10}{2}$

x1 = 5

$x2 = \frac{-b - \sqrt{Delta}}{2a}$

$x2 = \frac{-2 - 12}{2}$

$x2 = \frac{-14}{2}$

x2 = -7