W-4y+z=0 for z (please show work)

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

State one method by which you can recognize a perfect square trinomial.

Find the root(s) of f (x) = (x- 6)2(x + 2)2.