Question

Rezulatatul calculului: $\frac{\sqrt{45-3}}{{\sqrt{5} -1}}$ este...

Answer 1

(√45-3)/(√5-1)=√(45-3)(√5+1)/(√5-1)(√5+1)=
=(√225-3√5+√45-3)/(5-1)=
=(√225-3√5+3√5-3)/4=
=(15-3)/4=12/4=3