Question

If a +b+c=9 and ab+bc+ca=19
Find a^2+b^2+c+2.​

Answer 1

Answer:

43

Step-by-step explanation:

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

81=a^2+b^2+c^2+2*19

a^2+b^2+c^2=81-38

= 43