Question

pls pls pls help me ​

Answer 1

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

9×9=a2+b2+c2+2(26)

81-56=a2+b2+c2

therefore a2+b2+c2=25

Answer 2

Answer:

:) hope it would help you :)