Question

If a+b+c=9 and ab+bc+ca=26, then find
a²+b²+c² ?​

Answer 1

Answer:

We know the formula:

(a+b+c)² = a² + b² + c² + 2(ab+bc+ca)

Given:

a+b+c = 9 & ab+bc+ca = 26

Now putting the values in the above formula,

We get,

(9)² = a² + b² + c² + 2×26

81 = (a² +b² +c²) + 52

(a² +b²+c²) = 81-52

(a² + b² + c²) = 29 (Answer)

Step-by-step explanation:

Answer 2

Step-by-step explanation:

Hope it is helpful for u