Question

x ao quadrado - 6 x + 5 = 0 fórmula resolvente ​

Answer 1

x² - 6x + 5 = 0

a = 1

b = - 6

c = 5

∆ = b²-4.a.c

∆ = (-6)² - 4 . 1 . 5

∆ = 36 - 20

∆ = 16

x = - b ± √∆

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2a

x' = -(-6) - 4

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2 . 1

x' = 6 - 4

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2

x' = 2

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2

x' = 1

x" = -(-6) + 4

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2 . 1

x" = 6 + 4

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2

x" = 10

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2

x" = 5

S = {1 , 5}