Question

if a+b+c=9 and ab+b+ca=26 find a²+b²+c²​

Answer 1

Answer:

29

Step-by-step explanation:

(a+b+c) ²=9²

or,a²+b²+c²+2ab+2bc+2ac=81

or,a²+b²+c²+2(26)=81

or,a²+b²+c²+52=81

or,a²+b²+c²=81-52

or,a²+b²+c²=29

Therefore, a²+b²+c²=29(Ans)