f(x)=2x^2-x-1
A. Is th point (-2,9) on the graph of f?
B. If x=2, what is f(x) what point is on the graph of f?
C. If f(x)=-1, what is x? What point(s) ar on the graph of f?
D. what is the domain of f
E.list the x-intercept(s), if any of the graph of f
F. list the y-intercept, if any, of the graph of f