Question

a) x2 - 2x - 4 = 0



bháskara​

Answer 1

Resposta:

x² - 2x - 4 = 0

∆ = 4 - 4 × -4

∆ = 4 + 16

∆ = 20

x = (2 ± √20)/2

x = (2 ± 2√5)/2

x = 1 ± √5

x' = 1 - √5

x" = 1 + √5

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