SOLUTION: How do you determine the domain of f(x)=(x-1)(x+4) ? Thank you!

Question 773594: How do you determine the domain of f(x)=(x-1)(x+4) ? Thank you!
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
How do you determine the domain of f(x)=(x-1)(x+4) ?
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You start by assuming the domain is "All Real Numbers".
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Then you look for elements in the Rule that restrict values of "x", such as:
1. even root symbols:: sqrt(x) or sqrt(x-7) or 4th root of(x) etc.
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2. log(x) or ln(x-3) elements that have restricted domains
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3. factors in the denominator that cannot be zero
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4. There are others but 1,2,3 are the common restrictors.
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Your problem has none of these restrictors so the domain is "All Real Numbers".
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Cheers,
Stan H.
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