Răspuns :
(a²+b²)/ab=a²/ab+b²/ab=a/b+b/a
b/a=1/(3-√5)
a/b+b/a=3-√5+1/(3-√5)=[(3-√5)²+1]/(3-√5)=(9-6√5+5+1)/(3-√5)=(15-6√5)/(3-√5)
b/a=1/(3-√5)
a/b+b/a=3-√5+1/(3-√5)=[(3-√5)²+1]/(3-√5)=(9-6√5+5+1)/(3-√5)=(15-6√5)/(3-√5)