Question

Complete the square to re-write the quadratic function in vertex form: y = x ^ 2 - 2x - 8

Answer 1

Answer:

$y=(x-1)^2-9$

Step-by-step explanation:

$y=x^2-2x-8$

To complete the square:

$\frac{b}{2}=(-1)^2=1$

$y=x^2-2x-8$

$+9$                 $+9$

$y+9=x^2-2x+1$

$(x-1)^2=y+9$

          $-9$         $-9$

$y=(x-1)^2-9$

Answer 2

Answer:

(1,-9)

Step-by-step explanation:

Rewrite in vertex form and use this form to find the vertex

(h,k).