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x² - 2x - 120 = 0
x₁ = - (- 2) + √((2)² - 4 (- 120))/2
x₁ = 2 + √(4 + 480)/2
x₁ = 2 + √484/2
x₁ = (2 + 22)/2
x₁ = 24/2
x₁ = 12
x₂ = (2 - 22)/2
x₂ = - 20/2
x₂ = - 10
Respuesta.[12, - 10]