Question

a+b+c =8 and ab +bc+ca=19 find a^2 +b^2+c^2

Answer 1

( a + b + c ) 2 = a2 + b2 + c2 +2(ab + bc + ca)
8*8 = a2 + b2 +c2 + 2( 19)
64 = a2 + b2 + c2 + 38
a2 + b2 + c2 = 26

Answer 2

hiii friend
here is your answer ⬆⬆⬆


glad to help you
hope it helps
thank you.