Solve for the sum of all possible values of $x$ when $3^{x^2+4x+4}=9^{x+2}$.
Question:
Solve for the sum of all possible values of $x$ when $3^{x^2+4x+4}=9^{x+2}$.
Answer:
Let's think step by step.

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Solve for the sum of all possible values of $x$ when $3^{x^2+4x+4}=9^{x+2}$.
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