Question

Please solve it.....
If a+b+c=9 and ab+bc+ca=26, find a square +b square +c square?​

Answer 1

Answer:

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

9 x 9=a2+b2+c2+2(26)

81-52=a2+b2+c2

29=a2+b2+c2

Answer 2

follow the attachment.............