Question

menos x ao quadrado + 6x - 5 = 0
$- x2 + 6x - 5 = 0$
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Answer 1

-x² + 6x - 5

∆ = b² - 4 a c

∆ = 6² - 4 (-1) (-5)

∆ = 36 - 20

∆ = 16

- 6 +- √16 / 2.-1

-6 +- 4 / -2

x' = -6 + 4 / -2 = -2/-2 = 1

x" = -6 - 4 / -2 = -10 / -2 = 5