Question

w²-6w-7=0 fórmula de Bhaskara ​

Answer 1

Resposta:

S = { - 1 ; 7 }

Explicação passo-a-passo:

w² - 6w - 7 = 0

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

$w = \frac{ - ( - 6) + - \sqrt{ {( - 6)}^{2} - 4 \times 1 \times - 7 } }{2 \times 1}$

$w = \frac{6 + - \sqrt{36 + 28} }{2}$

$w = \frac{6 + - \sqrt{64} }{2}$

$w = \frac{6 + - 8}{2}$

$w1 = \frac{6 - 8}{2}$

$w1 = \frac{ - 2}{2}$

w' = - 1

$w2 = \frac{6 + 8}{2}$

$w2 = \frac{14}{2}$

w'' = 7