Question

(x-4)*(x+2)=0
5 puntos

Answer 1

x² + 2x - 4x - 8 = 0
x² - 2x - 8 = 0

$x = \frac{2 +- \sqrt{4 + 32} }{2}$
$x = \frac{2 +- \sqrt{36} }{2}$

x₁ = (2 + 6) : 2 = 4
x₂ = (2 - 6) : 2 = -2