If a vertex of a parabola is on the x axis and it's a value is positive so it opens upward, would there only be one function? For example x sqrt-2x +1 , the vertex form would be y= (x-1)sqrt(adsbygoogle = window.adsbygoogle || []).push({});

since it will never have neg y values , will u need to consider both functions like in other piecewise functions?

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# Piecewise functions

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