Question

if a^2+b^2+c^2=250 and ab+bc+ca=3 then find out a+b+c

Answer 1

the answer is 16.
root over 250 +6.
root over 256 equel 16

Answer 2

a²+b²+c²=(a+b+c)²+2(ab+bc+ac)
After substitution, you will get your answer