Question

Not sure where to start here! Complete the square and find the vertex form of:
g(x)= x^2-2x-5

Answer 1

To find the vertex... ?
well, to do completing square just add and subtract (1)^2.......

Answer 2

Ensure that the coefficient of x^2 is 1

Answer 3

x^2-2x-5 = x^2-2x + (-1)^2 -5 - (-1)^2
= (x - 1)^2 -5 - 1
= (x - 1)^2 - 6

Answer 4

The vertex is (1, -6)