Quadratics: put y = x^2 - 6x + 8 into a(x-h)^2 + k form

[joesawgunner]

For the function y = x^2 - 6x + 8, perform the following tasks:

a) Put the function in the form y = a(x - h)^22 + k.

 

[skeeter]

complete the square ...

y = x^2 - 6x + 8

y = x^2 - 6x + 9 - 9 + 8

y = (x^2 - 6x + 9) - 1

y = (x - 3)^2 - 1