Question

Que da?
(x − 3)(x − 1) = 15

Answer 1

Respuesta

Explicación paso a paso:

(x − 3)(x − 1) = 15

$x^{2}$ - x - 3x + 3 = 15

$x^{2}$ - 4x + 3 = 15

$x^{2}$ - 4x +3 - 15 = 0

$x^{2}$ + 2x - 6x + 3 - 15  = 0

$x^{2}$ + 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