Question

${x }^{2} - 5x - 6 = 0$
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Answer 1

x² - 5x - 6 = 0  

a = 1

b = -5

c = -6  

Delta:

Δ = b² - 4ac

Δ = (-5)² - 4 * 1 * -6

Δ = 25 - 24

Δ = 1

    Bhaskara:

    x = - b ± √Δ / 2a

    x = - (-5) ± √1 / 2 * 1

    x = 5 ± 1 / 2

    x' = 5 + 1 / 2 = 6 / 2 = 3

    x'' = 5 - 1 / 2 = 4 / 2 = 2