Question

fórmula de Bhaskara 9x² +30x -11=0​ ​

Answer 1

9x² + 30x - 11 = 0

∆ = b² - 4.a.c

∆ = 30² - 4.9.(-11)

∆ = 900 + 396

∆ = 1296

$x = \frac{ - b ± \sqrt{∆} }{2 \times a}$

$x = \frac{ - 30 ± \sqrt{1296} }{2 \times 9}$

$x = \frac{ - 30 ± 36}{18}$

$x' = \frac{ - 30 + 36}{18} \\ x" = \frac{ - 30 - 36}{18}$

$x' = \frac{1}{3} = 0.333 \\ x" = - \frac{11}{3} = - 3.66$