Question

as raizes da equacao x²-7x+12=0 respectivamente

Answer 1

Δ = (-7)² - 4.1.12
Δ = 49 - 48
Δ = 1

        7 + √1                 8
x' = ------------∴ x' = --------- ∴ x' = 4
          2.1                    2

        7 - 1                 6
x'' = --------- ∴x'' = -------- ∴ x'' = 3
          2                    2

Resposta: {4,3}

Answer 2

x² - 7x + 12 = 0

Δ = (-7)² - 4(1)(12)
Δ = 49 - 48
Δ = 1

$x = \frac{7~\pm~1}{2} \\ \\ x' = \frac{7~+~1}{2} =4 \\ \\ x'' = \frac{7~-~1}{2} =3$


S = {3, 4}