please tell the answer by step by step how the values came
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Answer:
a+b+c=9 and ab+bc+ca=28
(a+b+c)^2=a^2+b^2+c^2+2(ab+bc+ca)
^2 means (square) ok bro
81=a^2+b^2+c^2+2(26)
a^2+b^2+c^2=81-52
=29
value of a is 2
value of b is 3
and value of c is 4
therefore,
a^2 + b^2 +c^2
= 2^2 +3^2 +4^2
= 4 +9 +16
= 29