Question

if a+b+c=9 ab+bc+ca=26 then find a^2+b^2+c^2

Answer 1

Answer:

133

Step-by-step explanation:

using identity

a²+b²+c²=(a+b+c)²=a²+b²+c²+2(ab+bc+ca)

so,

putting values

9²+2(26)

81+52

=133

hope it helps :)