二分之(3-根号5)除以二分之(根号5减一)
=(3-根号5)/2×2/(根号5-1)
=(3-根号5)/(根号5-1)
=(3-根号5)(根号5+1)/(5-1)
=(3根号5-5+3-根号5)/4
=(2根号5-2)/4
=(根号5-1)/2
解:﹙3-√5﹚/2÷﹙√5-1﹚/2
=﹙3-√5﹚/﹙√5-1﹚
=﹙3-√5﹚﹙√5-1﹚/4
=﹙4√5-8﹚/4
=√5-2.
(3-√5﹚/2÷(√5﹣1﹚/2=﹙3-√5﹚/﹙√5-1﹚=﹙3﹣√5﹚﹙√5﹢1﹚/﹙√5﹣1﹚﹙√5﹢1﹚
=﹙2√5﹣2﹚/4=﹙√5﹣1﹚/2