Question

Me ajudem pfvv preciso disso para agora

Answer 1

x² + 6x + 8 = 0

a = 1

b = 6

c = 8

∆ = b² - 4ac

∆ = 6² - 4 . 1 . 8

∆ = 36 - 32

∆ = 4

x = - b ± √∆

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2a

x' = - 6 - 2

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2 . 1

x' = - 8

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2

x' = - 4

x" = - 6 + 2

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2 . 1

x" = - 4

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2

x" = - 2

S = {-4 , -2}