Question

Simplifique:

a) 2006² - 2005² / 2006 -2005

b)x²+ 5x +6/x²+7 x+10

Answer 1

a) 

(2006² - 2005²)/(2006 - 2005) = (2006 + 2005)*(2006 - 2005)/(2006 - 2005) =

2006 + 2005 = 4011

b) 

(x² + 5x + 6)/(x² + 7x + 10) = (x + 2)*(x + 3)/(x + 2)*(x + 5) = (x + 3)/(x + 5)

.