|x^2 - 2x - 3| = -(x^2 - 2x - 3), 0 <= x < 3(adsbygoogle = window.adsbygoogle || []).push({});

x^2 - 2x - 3, 3 <= x <=4

how did they get the intervals:

3 <= x <=4 and 0 <= x < 3?

I cannot, for the love of God, know how they determined it.

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# Absolute polynomial question (driving me nuts)

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