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anonymous
 4 years ago
If f(x + 3) = \(x^2 + 2x + 4\), find f(x).
Do I just plug in x + 3 for x?
anonymous
 4 years ago
If f(x + 3) = \(x^2 + 2x + 4\), find f(x). Do I just plug in x + 3 for x?

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Replace x + 3 by x.. So put x  3..

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Wait, why would that work? I just want to understand the dynamics of why it works.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0put x  3 inplace of x because f((x3)+3)=f(x3+3)=f(x)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0If you replace there x by x 3: Then: \[f(\color{green}{x} + 3) = f(\color{blue}{x  3} + 3) = f(x)\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Oh I get it now... f(x) = x^2  4x + 7?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Hey right this time you became 93.. Congratulations..
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