Question

a+b+c=13
ac+bc+ac=27
a²+b²+c²=?​

Answer 1

Step-by-step explanation:

this is your solution

a²+b²+c²= 115

Answer 2

Answer:

115

Step-by-step explanation:

using expansions equation

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

now just put the values given

(13)^2=a^2+b^2+c^2+2(27)

169-54= a^2+b^2+c^2