Question

X2-2x-15=0 factorizacion​

Answer 1

Respuesta:

(x + 3)(x - 5) = 0

Explicación paso a paso:

x² - 2x - 15 = 0

x² - 2x - 15 = x² + 3x - 5x - 15 = (x² + 3x) - (5x + 15)

= x(x + 3) - 5(x + 3) = (x + 3)(x - 5)

(x + 3)(x - 5) = 0

Soluciones:

(x + 3) = 0 => x + 3 = 0 => x = -3

(x - 5) = 0 => x - 5 = 0 => x = 5