Respostas

2014-02-14T23:29:02-02:00
2^-2+5^0-3^2=
1/4+1-9=
5/4-9=
41/4
2014-02-14T23:51:46-02:00
2^ (-2) = 1/2^2 = 1/4 = 0,25
 5^0 = 1
 3^2 = 9

sendo assim,

2^ (-2)+  5^0+3^2 =
0,25 + 1- 9 = -7,75