If anyone's curious why I'm asking mucho amounts of questions, it's because I got these ones wrong on a test and don't know how to do them. :c #oops

Consider the function f(x)=x^2−6x+8. The function has been rewritten in different forms.

(x−3)^2
−1 with zeros at −3 and −1.
(x−4)(x−2), with zeros at 4 and 2
(x−3)
2
−1, with zeros at 3 and 1.
(x−4)(x−2), with zeros at −4 and −2

Question

If anyone's curious why I'm asking mucho amounts of questions, it's because I got these ones wrong on a test and don't know how to do them. :c #oops

Consider the function f(x)=x^2−6x+8. The function has been rewritten in different forms.

(x−3)^2
−1 with zeros at −3 and −1.
(x−4)(x−2), with zeros at 4 and 2
(x−3)
2
−1, with zeros at 3 and 1.
(x−4)(x−2), with zeros at −4 and −2