How do you put answers in standard form from vertex form?

How do you convert vertex form to standard form? If the equation is y = 3 (x + 4) 2 - 6, the value of h is - 4, and k is - 6. To convert a quadratic from y = ax2 + bx + c form to vertex form, y = a (x - h) 2 + k, you use the process of completing the square. Let's see an example. Convert y = 2x2 - 4x + 5 into vertex form, and state the vertex.