Graphing square and cube root functions | Algebra 2 | Khan academy

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We can graph various square root and cube root functions by thinking of them as transformations of the parent graphs y=√x and y=∛x.

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[dave]

Hi Sal,
I use your videos in my school work. Thanks very much for taking them. I need to find the maximum/minimum points for y= 3x^2/3. The derivative is; y'= 2x^-1/3. Question is, how do I solve
0 = 2x^-1/3 for x.

Thank you very much.

[glummybear]

I'm so confused. What does y= the square of x mean? What does the cubed root of x mean? Where do we even start on the graph? I wish this was explained better.

[kirsten]

Am I going insane? You can't square root a negative number