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Posted by on Sunday, February 19, 2012 at 10:36am.

prove that

(n-1) squared + n + (n+1)squared = 3n +2

  • maths - , Sunday, February 19, 2012 at 10:58am

    Left side
    = (n-1)^2 + n + (n+1)^2
    = n^2 - 2n + 1 + n + n^2 + 2n + 1
    = 2n^2 + n + 2

    ≠ 3n+2

    the statement is false

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