Question

25 x elevado a 2 menos 5x - 2 = 0​

Answer 1

Resposta:

$25 {x}^{2} - 5x - 2 = 0$

$delta = {b}^{2} - 4 \times a \times c$

$delta = (- {5})^{2} - 4 \times 25 \times - 2 \\ delta = 25 + 200 \\ delta = 225$

$x = \frac{ - b + ou - \sqrt{delta} }{4 \times a}$

$x = \frac{5 + ou - \sqrt{225} }{50} \\ x1 = \frac{5 + 15}{50} \\ x1 = \frac{20}{50}$

$x2 = \frac{5 - 15}{50} \\ x2 = \frac{ - 10}{50}$