Find all of the zeros of the following

Is this a polynomial function? i need to know asap

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

Factor this polynomial completely. x^2-8x+12