Question

A+b+c = 13, ab+bc+ca = 50, find the value of a^2+b^2+c^2

Answer 1

Answer:

69

Step-by-step explanation:

a + b + c = 13 ; ab +bc +ca = 50

(a + b + c)^2 = a^2 + b^2 + c^2 +2(ab + bc + ca)

(13)^2 = a^2 + b^2 + c^2 + 2*50

a^2 + b^2 + c^2 = 169 - 100 = 69