Tolong pertanyaan di jawab...

 x - 2       x - 4
-------  = --------  ===> perkalian silang
 x + 2      x + 4

(x - 2)(x + 4) = (x - 4)(x + 2)

x² + 4x - 2x - 8 = x² + 2x - 4x - 8

x² + 2x - 8 = x² - 2x - 8

x² + 2x - 8 - x² + 2x + 8 = 0

4x = 0 ===> x = 0

semoga jelas dan membantu ya