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    $\begingroup$ This is good, but it would be better with EvaluationMonitor :> Print["x = ", x , ", x^", a, " - 2 = ", x^a - 2]. With this change, one can see what the actual exponent of x is. $\endgroup$ Commented May 3, 2014 at 21:00
  • $\begingroup$ @m_goldberg Thanks, I have edited my answer accordingly. $\endgroup$ Commented May 3, 2014 at 21:11
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    $\begingroup$ Also, your solution has the drawback that the three results are not put into the output history. It is not possible to retrieve them later with Out. Because of this I think you should consider another modification -- changing FindRoot[...] to rule[a] = FindRoot[...] -- allowing latter access to the results of FindRoot as rule[1], rule[2], rule[3]. $\endgroup$ Commented May 3, 2014 at 21:56
  • $\begingroup$ @m_goldberg I see your point, but this question is about output formatting. You suggest some kind of memoization which is useful but not strictly related to the question. $\endgroup$ Commented May 3, 2014 at 22:04