Question

If a^2+b^2+c^2=70 and ab+bc+can=37 then a+b+c

Answer 1

Step-by-step explanation:

(a+b+c)² = a²+b²+c² + 2(ab+bc+ca)

(a+b+c)² = 70 + 74

(a+b+c)² = 144

a+b+c = 12