Question

if a+b+c=6 and ab+bc+ca=15, thena^+b^+c^=​

Answer 1

Answer:

a² + b² + c² = 6

Step-by-step explanation:

We know that,

(a²+b²+c²)² = a² + b² + c² + 2ab +2bc +2ca

=> a² + b² + c² + 2(ab + bc + ca)

So, (6)² = a² + b² + c² + 2(15)

a² + b² + c² = 36 - 30 = 6