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I'm having real trouble trying to figure out how/in which direction to plot the graph. The math in the explanations doesn't make sense. Here's an example:   Now let's use a translation to bring ...

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In this explanation, I cannot figure out where the 1 came from. It just suddenly appears! Can anyone explain?

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Where does the "1" come from? I'm also unclear how the "factoring out" works.

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As I do the exercises, I have yet to correctly solve a single one. The hints mention something about substituting p, but I have no clue what to do next. For example p^2-5p=0 Can anyone give me a cl...

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I haven't the slightest idea how to set up an equation to solve this problem (or any problems in the exercise, for that matter.) Are there some general principles I'm just not getting?