Diagonalize the given matrix, if possible. (Find P and D such that A = PDP−1 for the given matrix A. Enter your answer as one augmented matrix. If the matrix is not diagonalizable, enter DNE in any cell.)

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.