Respuesta
Explicación paso a paso:
(x − 3)(x − 1) = 15
[tex]x^{2}[/tex] - x - 3x + 3 = 15
[tex]x^{2}[/tex] - 4x + 3 = 15
[tex]x^{2}[/tex] - 4x +3 - 15 = 0
[tex]x^{2}[/tex] + 2x - 6x + 3 - 15 = 0
[tex]x^{2}[/tex] + 2x - 6x - 12 = 0
x * (x-2) - 6x - 12 = 0
x * x+2 - 6 (x+2) = 0
(x+2) * (x-6) = 0
x + 2 = 0
x - 6 = 0
x = -2
x - 6 = 0
x = -2
x = 6
x1 = 2, x2 = 6
