What is the effect on the graph of the function f(x) - x when f(x) is replaced with f(x) + 2?
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I'm assuming you meant:
Let
Thus, we can rewrite it into a quadratic.
Hence,
or 
or 
Rewriting it in general form, we get:
From there, you can find your solutions from
Let
Thus, we can rewrite it into a quadratic.
Hence,
Rewriting it in general form, we get:
From there, you can find your solutions from