Odpowiedzi

2009-12-10T19:36:52+01:00
(4√5)² -( √5)² = 16 razy 5 - 5 = 80 - 5 = 75
2009-12-10T19:45:38+01:00
4√5²-√5²=√80²-√5²=80-5=75