- Which points are best found by inspection?
- Which points are best found by substitution?
- Which points are best found by symmetry?

$y = (x-2)^2(x+2)$

$y = (x-1)^3$

$y = x^3-8$

$y=x^3+3x^2$

$y=(x-3)^2(x+3)^2$

$y=(x-3)^2(x+3)^2$

What are your favorite examples of this?

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