Question

If (a+b+c)=9(ab+BC+CA)=5 find (a^2+ b^2c^2)​

Answer 1

Step-by-step explanation:

Given, a+b+c=9 and ab+bc+ca=26.

We know, (a+b+c)

2 =a 2 +b 2 +c 2+2ab+2bc+2ca

⇒(a+b+c) 2

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

putting the values here, we get(9) 2 =a 2 +b 2 +2(26)

⇒81=a