In Exercises 1–30, find the domain of each function. f(x) = x² - ...

Question

In Exercises 1–30, find the domain of each function. f(x) = x² - 2x - 15

Accepted Answer

Hello today we're going to be finding the domain of a given function. So the function given to us is F of X is equal to X squared minus 15 X plus 26. Now this is in the form of a polynomial and the domain of any polynomial is going to be the set of all real numbers, which is negative infinity to positive infinity. The reason for this is because you can plug in any value of X into this polynomial and this won't give you an undefined value or better yet any value of X can work with this polynomial. So the domain of any polynomial function is going to be negative infinity to positive infinity. And the answer to this problem is going to be D. So I hope this video helps you in understanding how to find the domain of a polynomial function. And I'll go ahead and see you all in the next video.

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