Seems like a typo to me.
I'm confused about this problem in my precalc class. I already know what the answer is, but I don't understand why with the equation:
the answer says that -2 is included in the domain if , but -2 is not included in the domain if , shouldn't it be the other way around?
I don't know, I hope it's just me. Basically the dot on the the line at the coordinates (-2,1) has a closed circle, and the dot on the line at (-5,-2) has an open circle. I'd make a graph of it, but I'm not sure how to do that on this forum. I just thought it would be an open circle at (-2,1) and an closed circle at (-2,-5) with a range of .