Question

If a+b+c=15 and ab + bc + ca =71, then
find the value of a² + b2 + c2.​

Answer 1

Answer:

54

mark me the brainliest

Answer 2

Answer:

83

Step-by-step explanation:

we have to expand (a+b+c)²

(a+b+c)²=a²+b²+c²+2(ab+bc+ca)