Question

1-
3x²-2x-1=0
qual o desenvolvimento pfvr
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Answer 1

3x² - 2x - 1 = 0

a = 3, b = - 2, c = - 1

Δ = b² - 4ac

Δ = (- 2)² - 4 · (3) · (- 1)

Δ = 4 + 12

Δ = 16

x = - b ± √Δ / 2a

x = - (- 2) ± √16 / 2 · 3

x = 2 ± 4 / 6

x₁ = 2 + 4 / 6 = 6 / 6 = 1

x₂ = 2 - 4 / 6 = - 2 / 6 = - 1/3