Question

if a+b+c=9,ab+bc+ca=14,find;a^2+b^2+c^2​

Answer 1

Answer:

53

Step-by-step explanation:

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

Answer 2

Answer:

(a+b+c)^2=a^2+b^3+c^2+ab+bc+ca

81=a^2+b^2+c^2+14

a^2+b^2+c^2=81-14=67