Question

If (a + b + c) (a - b + c)= a² + b + c² show
that ab, c are in continued proportion​

Answer 1

Answer:

Step-by-step explanation:

(a + b + c) (a - b + c)= a² + b² + c²

a²-ab+ca+ab-b²+bc+ca-bc+c²=a² + b² + c²

2ca-2b²=0

2b²=2ca

b²=ca

so a/b = b/c

or a:b :: b:c

Thus  a,b, c are in continued proportion​