Question

if a+b+c=12 and a^2+b^2+c^2=50 find ab+bc+ca​

Answer 1

ab+bc+ca=47
Pls mark it as brainliest

Answer 2

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

(15)^2 = 50 + 2 ( ab + bc + ac)

225 - 50 = 2 ( ab + bc + ac)

175/2 = ( ab + bc + ac)

( ab + bc + ac) = 87.5