Respostas

2014-04-18T16:34:53-03:00
A) 1 x.1 =1
(-1) +. 1 =-2. x'= 1. x'' =1

b) 2x5= 10
2+5=7. x' = 2. x''= 5
2014-04-18T16:43:53-03:00
A) x² + 2x + 1 = (x+1).(x+1) = x² + x + x + 1 = x² + 2x + 1

b) 
x² - 7x + 10 = (x-5).(x-2) = x² - 5x - 2x + 10 = x² - 7x + 10