Question

a+b+c=9 and ab+bc+ac=26,find a^2 +b^2 +c^2

Answer 1

29 .

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Answer 2

Hey !!

Answer:

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

Substituting the value , we get :-

9^2 = a^2 + b^2 + c^2 + 2 x 26

81 = a^2 + b^2 + c^2 + 52

81 - 52 = a^2 + b^2 + c^2

29 = a^2 + b^2 + c^2

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