Răspunsuri

2014-11-09T20:09:09+02:00
(6+√5)*(6-√5)=6·6-6√5+6√5-5=36-5=31
Ii formula (a+b)(a-b)=a²-b²
(6+√5)*(6-√5)=6·6-6√5+6√5-5=36-5=31
Multumesc
Cel mai inteligent răspuns!
2014-11-09T20:11:04+02:00
(6+√5)*(6-√5)=6*6-5=36-5=31 folosesti formula patratelor perfecte :)