Question

x al cuadrado + 14 x -15 = 0​

Answer 1

Respuesta:

x² + 14x - 15 = 0

x² + 15x - x - 15 = 0

x × (x + 15) - (x - 15) =0

(x + 15) × (x - 15) = 0

x + 15 = 0

x - 1 = 0

x = -15

x = 1

x₁ = -15 , x₂ = 1