Question

If a2 + b2 + c2 = 250 ; ab+bc+ca = 3 ; find a+b+c

Answer 1

Answer:

(a+b+c)2=a2+b2+c2+2(,ab+bc+ca)

(a+b+c)2=250+2×3

(a+b+c)2=250+6

(a+b+c)2=256

a+b+c=16(Ans)

Answer 2

This is the answer, I think. Hope it helps!