Y=9x2+4x the leading coefficient?

Taking algebra two apex courses and need with these questions

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

For the quadratic function [tex]y=(x+4)^2-1[/tex] , do the following: a) rewrite the function in the standard form, b) rewrite the function in intercept form, c) find the vertex, d) find the y-intercept, e) find the x-intercepts.