Hi everyone..

I am new learner in maple program. I have quadratic exercise and It is important for me to sove it perfect. I tried to solve it but I am

not sure about me answers.I need your help please. 

This is the question:

 - Given the equations: y=2(x-4)^2-18 and y=2x^2-8x-16, answer the questions below:

1- Find the y-intercept for each of functions

2-Find the zeros of of both functions

3- Find their General and vertex from respectively.