Respuesta:
x(x + 6) - 2x - 6 = (x - 4)(x - 5)
x^2 + 6x - 2x - 6 = x^2 + 5x - 4x + 20
x^2 - x^2 + 6x - 2x - 5x + 4x = 20 + 6
3x = 26
x = 26/3
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Respuesta:
x(x + 6) - 2x - 6 = (x - 4)(x - 5)
x^2 + 6x - 2x - 6 = x^2 + 5x - 4x + 20
x^2 - x^2 + 6x - 2x - 5x + 4x = 20 + 6
3x = 26
x = 26/3