Question
Write the domain of the function in interval notation.Write numbers as integers or simplified fractions. \[ f(x)=\frac{x^{2}-25}{x-5} \] The domain of \( f(x) \) is \( \square \). (ロ,ロ)[ロ,ロ](ロ,ロ]
Ask by Weaver Frazier. in the United States
Mar 17,2025
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Answer
The domain of \( f(x) \) is \( (-\infty, 5) \cup (5, \infty) \).
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The function \( f(x) = \frac{x^2 - 25}{x - 5} \) can be simplified. Notably, \( x^2 - 25 \) factors to \( (x - 5)(x + 5) \), which allows us to cancel \( x - 5 \) from the numerator and denominator, except where \( x = 5 \). Therefore, the function is defined for all real numbers except \( x = 5 \). In interval notation, the domain of \( f(x) \) is \( (-\infty, 5) \cup (5, \infty) \).