# Finding the implied domain of a function

Learn how to find the domain of a radical function. Recall that the domain of a function is the set of possible input values (x-values) of the function. For a radical square-root function, there cannot be a negative number inside the radical. Thus, to find the domain of a radical square root function, we set up the value inside the radical as an inequality greater than or equal to 0 and solve for the inequality for the variable.

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Last question +&- 3 should not take the ans is =R except(+3, -3)

God bless you Brain McLogan. True Hero

Also, what if u had a plus inside teh square root of teh first function instead of a minus? How would taht work? Since u can't possibly do difference of squares there nor simplify

Hey. So u didn't explain how to find the range of each function. Can u please make a video on that as well? And if not, can u tell me how

I always have a hard time determining whether a problem’s solution is all real numbers or has one solution, this helps enlighten me more, thanks!

God bless you my friend.

X^2 -9 > 0 …. it's an inequality not an equality

Thanks for your help with this

Can you write the answer (-2,3) also?

These videos are incredibly helpful and super easy to follow! I work a lot and can only attend night school once a week making it hard to pick up where we leave off in class, so finding a math teacher who has a video for everything we learned and explaining in detail the lessons is amazing! Thank you so much!

Thank You!

it's called rugby mate, don't remember the game but must have been a great one

your very welcome, let me know how else i can help!

Thanks for putting in the effort to make these videos. They really help!

thank you I appreciate it!

You're a life saver sir

thank you I appreciate it!

i have a question that i have asked various physicst and mathematicians they all seem to give differnet theorys or do not no can you please tell me how i can explain an implied infinative inside a math equation?