Question

Usando a formula de Bhaskara, resolva as seguintes equações:
a) $x^{2}$+9x+14=0

Answer 1

$x= \frac{-b+/- \sqrt{b ^{2}-4ac } }{2a}$

$x= \frac{-9+/- \sqrt{9 ^{2}-4*1*14} }{2*1} = \frac{-9+/- \sqrt{25} }{2}= \frac{-9+/-5}{2}$

$x'=- \frac{-9+5}{2}=-2$

$x"= \frac{-9-5}{2} =-7$