Question

if a+b+c=8 and ab+bc+ca=13,find the value of a^2+b^2+c^2​

Answer 1

Step-by-step explanation:

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

from this

8^2=a^2+b^2+c^2+2(13) a^2+b^2+c^2=64-26=38

like if u satisfy with me