Odpowiedzi

2009-11-11T16:27:33+01:00
(5-2√6) * 5+2√6 = 5-2√6

2.
[(1+√5)²- (1-√5)²]²= [1+2√5+5-1+2√5-5]² = [ 4√5]² = 16*5 = 80