Respostas

2013-06-11T16:57:45-03:00

-2² +8(-2) + 9

-4 -16 + 9
-20 +9 = -11 

 

 

 

 

2013-06-11T16:58:15-03:00

onde tem x vc coloca -2 e resolve

-2² +8(-2) + 9

-4 -16 + 9
-20 +9 = -11