Which products result in a perfect square trinomial? check all that apply. a=(–x + 9)(–x – 9) b=(xy + x)(xy + x) c=(2x – 3)(–3 + 2x) d=(16 – x2)(x2 – 16) e=(4y2 + 25)(25 + 4y2)

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.