Question

me ajudem..
(3x+2).(2x+1)​

Answer 1

(3x + 2) . (2x + 1)

6x² + 3x + 4x + 2

6x² + 7x + 2 = 0

a = 6

b = 7

c = 2

∆ = b² - 4 . a . c

∆ = 7² - 4 . 6 . 2

∆ = 49 - 48

∆ = 1

x = - b ± √∆

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2a

x' = - 7 + 1

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2 . 6

x' = - 6 (÷6)

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12 (÷6)

x' = - 1

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2

x" = - 7 - 1

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2 . 6

x" = - 8 (÷4)

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12 (÷4)

x" = - 2

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3

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