Question

y = x2 - 16x + 73

Answer 1

Do u have to Find the vertex of the parabola?

Answer 2

If u do here u go:
y = x² - 16x + 73

Convert to Vertex Form, y = a(x - h)² + k, where (h, k) is the vertex:

y = (x² - 16x) + 73
y = (x² - 16x + 64) + 73 - 64
y = (x - 8)² + 9

Vertex (8, 9)