Respostas

2013-06-18T11:06:32-03:00

2(2)²-(2)+3=

8-2+3=

9

 

b)2(-1)²-(-1)+3=

2+1+3=

6

 

c)2(1/3)-(1/3)+3=

2/3-1/3+3=

1/3+3=

10/3

 

d)2(-1/2)-(-1/2)+3=

-1+1/2+3=

2+1/2=

5/2