how to solve for k for a quartic function

I don't know but I think u mean quadratic so if you do then I think this should be the answer ... 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.

Yes they are correct