Question

Qual o resultado?
-x²+6x-5=0​

Answer 1

Resposta:

Δ=6

2

−4.(−1).(−5)

Δ=36−20

Δ=16

x= \frac{-6\pm \sqrt{16} }{-2}x=

−2

−6±

16

x= \frac{-6\pm4}{-2}x=

−2

−6±4

\boxed{x_1= \frac{-6-4}{-2}~\to~5 }

x

1

=

−2

−6−4

→ 5

\boxed{x_2= \frac{-6+4}{-2} ~\to~1}

x

2

=

−2

−6+4

→ 1