Question

A raízes: 1 e -3 vértice V= (2,1)

B raízes: -1 e 3 vértice V= ( -2,1)

C raízes: 0 e 3 vértice V= (2,1)

D raízes: -1 e 2 vértice V= (1,3)

E raízes: 1 e 3 vértice V= (2,-1)

Answer 1

x² - 4x + 3 = 0

a = 1

b = - 4

c = 3

∆ = b² - 4 . a . c

∆ = (-4)² - 4 . 1 . 3

∆ = 16 - 12

∆ = 4

x = - b ± √∆

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2a

x' = - (-4) - 2

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2 . 1

x' = 4 - 2

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2

x' = 2

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2

x' = 1

x" = - (-4) + 2

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2 . 1

x" = 4 + 2

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2

x" = 6

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2

x" = 3

xv = - b

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2a

xv = -(-4)

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2 . 1

xv = 4

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2

xv = 2

yv = - ∆

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4a

yv = - 4

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4 . 1

yv = - 4

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4

yv = - 1

Letra E