This is a example of graphing a Quadratic Equation in Standard form:

By the way these are functions

here I have: -2(x-3)+8 (x-3) is raised to the second power

The vertex of this equation is (3,8).I cant figure out why it is not -3,8!!

On another equation it has (x+3) +1 with (x+3) being raised to the second power. On this one the vertex is (-3,1).I cant figure why b, while being negative in both equations, gets two different results.