Question

If a+b+c=9 and ab+ bc+ca=26, Find a² +b2+C²​

Answer 1

Answer: 29 sorry for in 1 1 line explanation

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

+c  

2

+2(26)

⇒81=a  

2

+b  

2

+c  

2

+52

⇒a  

2

+b  

2

+c  

2

=81−52=29.

Answer 2

Answer:

therefore the answer is 29