Question

X²+8x+15=0 em bhaskara

Answer 1

x² + 8x + 15 = 0

a = 1

b = 8

c = 15

∆ = b² - 4 . a . c

∆ = 8² - 4 . 1 . 15

∆ = 64 - 60

∆ = 4

x = - b ± √∆

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2a

x' = - 8 - 2

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2 . 1

x' = - 10

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2

x' = - 5

x" = - 8 + 2

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2 . 1

x" = - 6

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2

x" = - 3