PLZ HELP I NEED A THIS DONE IN LIKE 30 MIN

How can you decide witch operations to use to slice a two step equation

What number should be added to both sides of the equation to complete this square? x^2-10x=7

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.