Question

if a + b + C is equal to 17 and a b + BC + CA is equal to 92 then a square + b square + c square is equal to​

Answer 1

Answer:

(a+b+c)²= a²+b²+c²+2ab+2bc+2ca

a²+b²+c²=(a+b+c)²-2(ab+bc+ca)

and then put the value

a+b+c=17

ab+bc+ca=92