Question

if a + b + c = 6 and AB + bc + CA = 8 then find a² + b² +c²

Answer 1

hope this will help u.. :-)

Answer 2

(a+b+c)^2 = 36
a^2 + b^2 + c^2 + 2(ab+BC+ca )= 36
so a^2 +. b^2 + c^2 = 36-16 . (as ab+BC +ca = 8)
and is 20