2.下列计算正确的是( )
0 284653 284661 284667 284671 284677 284679 284683 284689 284691 284697 284703 284707 284709 284713 284719 284721 284727 284731 284733 284737 284739 284743 284745 284747 284748 284749 284751 284752 284753 284755 284757 284761 284763 284767 284769 284773 284779 284781 284787 284791 284793 284797 284803 284809 284811 284817 284821 284823 284829 284833 284839 284847 366461
| A. | a6÷a2=a3 | B. | $\sqrt{9}$+$\sqrt{2}$=3$\sqrt{2}$ | C. | (a2)3=a6 | D. | (a+b)2=a2+b2 |