Graphing parabolas and absolute values?

Question

Given f(x) = x^2 - 2x

sketch | f(x) |

---------

| | = absolute value...

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can you explain this and give me some points?

Answer 1

the graph of this function is differs from f (x) only in the interval [0, 2], where the parable in this range is "reversed" upwards. accordingly summit will be the point (1, 1) and not (1; -1) of the parable of departure.

I hope you is clear, I apologize for my bad English ....