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x₁ = - (- 2) + √((2)² - 4 (- 15)/2
x₁ = 2 + √(4 + 60)/2
x₁ = 2 + √(64)/2
x₁ = (2 + 8)/2
x₁ = 10/2
x₁ = 5
x₂ = (2 - 8)/2
x₂ = - 6/2
x₂ = - 3
Solución :
x₁ = 5
x₂ = - 3