How do you rewrite x^2-16x+15

Question

In vertex graphing from state the vertex

Answer 1

y = x² - 16x + 15

y - 15 = x² - 16x

Complete the square to obtain: y - 15 + 16 = x² - 16x + 16

y + 1 = (x-4)² So, y = (x-4)² - 1.

The parabola opens upward with vertex (lowest point) (4,-1).