Răspuns:
a) 2,1 la puterea a doua = 2,1×2,1=4,41
b) 3,5 la puterea a doua = 3,5×3,5=12,25
c) 0,28 la puterea a doua = 0,28×0,28=0,0784
d) 8,19 la puterea a doua = 8,19×8,19=67,0761
e) 4,56 la puterea a doua = 4,56×4,56=20,7936
