Răspunsuri

2014-06-17T23:04:31+03:00
X² - 2x - 15 = (x - 5)(x + 3)  
(x - 5)(x + 3) / (x - 5) = (x - 3)
    
x² - 10x + 25  = (x - 5)(x - 5) = (x - 5)²
(x - 5)² / (x - 5) = (x - 5)