Question

Help with graphing problem? will award medal for best answer!

Graphs of irrational functions show things about extraneous solutions. Let f(x) = x - √x-2

a. find f(11), f(6), f(2), f(2), and f(0).
b. plot the graph of the function.
c. what is the domain of x if f(x) is to be a real number?
d. show that there are no real values of x for which f(x)=0.

please help! If you could plot the graph and answer all that would be awesome! Im so confused