Răspunsuri

2014-05-16T15:17:48+03:00
Dupa formula (a+b)²=a²+2ab+b²
(3,0+6,9)²=3²+2*3*6.9+6.9²=
=9+41.4+47.61=
=98.01
2014-05-16T15:23:51+03:00
3,0+6,9=9,9
9,9 la puterea a doua =9,9*9,9=99*99=9801