how to find vertex form examples
You can think of the formula for finding the vertex of a quadratic function as being (x, y) = [(-b/2a), f(-b/2a)] . This just means that to get the y value, you have to find the x value based on the formula and then plug it back into the equation. Here's how you do it: 1  y = x 2 + 9x + 18.