Question

Resolva em formula de Bhaskara x2 - 17x + 72 = 0

Answer 1

Resposta:

$x_{1}= 9\\ x_{2}= 8$

Explicação passo-a-passo:

x² - 17x + 72 = 0 => Δ =b² - 4ac => Δ =(-17)² - 4(1)(72) => Δ = 289 -288 =>  Δ = 1

x = -b±√Δ/2a => x = 17±1/2 =>  $x_{1} = \frac{17+1}{2} = \frac{18}{2} => x_{1} =9\\ x_{2} = \frac{17-1}{2} = \frac{16}{2} => x_{2} =8$