Respostas

2014-05-05T19:54:46-03:00
X= -( 1 - 1/4) = 4-1/4 x= -3/4

y=1/4 - 1 =  1-4/4  y =-3/4
2014-05-05T20:15:38-03:00
X = - (1 - 1/4) 
X = - (4 - 1)
X = -3

Y = (1/4 - 1)
Y = 1 - 4
Y = -3

X . Y => -3 . -3 = 9