Respostas

2014-08-27T13:57:10-03:00
(-4) elevado a 2 -4.1.5= 16 -20= -4
X= -4+(-4)/2.1 = - 4 -4/2 = -8/2 = -4

X =  -4 -(-4)/2 = -4 + 4  /2 = 0/2

X= -4
X= 0/4