How I find the domain of √(2x2-7)? Please include all steps so I know what I'm doing, because I have no idea how to find the answer. Thanks!
Hi again M;
As you already know, we cannot square root anything less than zero. We therefore must find the minimum value of 2x2-7
-√3.5≥x Note the fact that because I multiplied the figure by a negative sign, I had to reverse the less than to greater than signage.
domain is (-∞, -√3.5]U[√3.5, +∞)