Q. 54.2( 6 Votes )

# If (a + b + c) =

Answer :

It is given in the question that,

(a + b + c) = 8

And, (ab + bc + ca) = 19

We know that,

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

(8)2 = a2 + b2 + c2 + 2 × 19

64 = a2 + b2 + c2 + 38

64 – 38 = a2 + b2 + c2

a2 + b2 + c2 = 26

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