verify the identity (a+b+c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ac ?
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(a+b+c)² = a² + b²+ c² + 2ab + 2bc + 2ac
Take a Example
( 2 + 7 + 4 )²
= 2² + 7² + 4² + 2×2×7 + 2× 7×4 + 2× 2×4
= 4 + 49 + 16 + 28 + 56 + 16
Hence verify identity
(a+b+c)² = a² + b²+ c² + 2ab + 2bc + 2ac
Take a Example
( 2 + 7 + 4 )²
= 2² + 7² + 4² + 2×2×7 + 2× 7×4 + 2× 2×4
= 4 + 49 + 16 + 28 + 56 + 16
Hence verify identity
(a+b+c)² = a² + b²+ c² + 2ab + 2bc + 2ac
Hacker20:
i hope this right
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Answer:
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