Question

resolva a equação do 2⁰ grau 4x²+8x+5=2​

Answer 1

4x² + 8x + 5 = 2

4x² + 8x + 5 - 2

4x² + 8x + 3 = 0

a = 4

b = 8

c = 3

∆ = b² - 4 . a . c

∆ = 8² - 4 . 4 . 3

∆ = 64 - 48

∆ = 16

x = - b ± √∆

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2a

x' = - 8 - 4

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2 . 4

x' = - 12 (÷4)

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8 (÷4)

x' = - 3

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2

x" = - 8 + 4

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2 . 4

x" = - 4 (÷4)

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8 (÷4)

x" = - 1

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2

S = {-3/2 , -1/2}