Question

If a+b+c= a
ab + bc + ca = 18
Find a² +b² +c²
Using identity (a+b+c) square​

Answer 1

hii it's correct or not

Answer 2

Hey there!

Answer:

a² + b² + c² = a² - 36

Step-by-step explanation:

Given,

ab + bc + ca = 18

And,

(a + b + c) = a

Sqauring both sides,

(a + b + c)² = a²

a² + b² + c² + 2 ( ab + bc + ca) = a²

a² + b² + c² + 2 * 18 = a²

a² + b² + c² + 36 = a²

a² + b² + c² = a² - 36

Hope It Helps You!