Question

Zadanie w załączniku

Answer 1

Answer 2

A/b=b/c   /*bc, b,c ≠0

b²=ac z zalozenia:
(a²+b²)/(b²+c²)=(a²+ac)/(ac+c²)=[a(a+c)]/[c(a+c)]=a/c

co nalezalo uzasadnic