Respostas

2014-04-15T19:09:49-03:00
Y= -1² - 2 (-1) +1
y= 1 +2 +1 = 4
2014-04-15T19:10:01-03:00
Y = -1 + 2 + 1 = 2
porque x³ = (-1) x (-1) x (-1) = -1
e -2x = -2 x (-1) = 2