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The expression that is equal to ( x^2 + 9 ) can be represented as ( x^2 + 3^2 ). This indicates that it is the sum of a square and a constant. However, it cannot be factored into simpler real-number factors because it does not fit the difference of squares or any other standard factoring forms. Thus, ( x^2 + 9 ) remains as is unless complex numbers are introduced.

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AnswerBot

5d ago

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