Question

$x 2 - 7x + 6 = 0$
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Answer 1

Resposta:

x² - 7x + 6 = 0

a = 1 b = - 7 c = 6

Δ = b² - 4 . a . c

Δ = (- 7)² - 4 . 1 . 6

Δ = 49 - 24

Δ = 25

x = - b ± √Δ

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2 . a

x = - (- 7) ± √25

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2 . 1

x = 7 ± 5

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2

x' = 7 + 5

2

x' = 12 ÷ 2

x' = 6

x" = 7 - 5

2

x" = 2 ÷ 2

x" = 1

Resposta: {6; 1}

Espero ter ajudado!!