Question

De acordo com a formula de Delta,responda:

$b {}^{2} - 4.a.c$
$x2 - 2x - 1 = 0$

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Answer 1

x² - 2x - 1 = 0

Δ = b² - 4ac

Δ = (-2)² - 4.1.(-1)

Δ = 4 + 4

Δ = 8