Question

-x²+2x-1=0
qual e a formula de baskara.

Answer 1

Olá.

   -x² + 2x - 1 = 0

a=-1    Δ = b² - 4ac

b=2    Δ = 2² - 4 . (-1) . (-1)

c=-1    Δ = 4 - 4

         Δ = 0

x = -b ± √Δ /2a

x = -2 ±√0 /2(-1)

x = -2 ± 0 /-2

x = -2 /-2

x = 1