Question

if a+b+c= 10 and ab + bc+ca =5 then find a^2+b^2+c^2​

Answer 1

Step-by-step explanation: a square + b square + c square + 2 ab + 2 b c +2 CA is equal to (a+b+c)^2

Answer 2

(a+b+c)² = a²+b²+c²+2(ab+bc+ac)

(10)² = a²+b²+c²+2×5

100 = a²+b²+c²+10

100–10 = a²+b²+c²

a²+b²+c² = 90