Write down the exact solutions to the equation x^2 -4x -23 = 0

Enter the exact answers with the square root (dont round)

Hence or otherwise solve the inequality x^2 - 4x -23 (less than or equal to) 0

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.