how do I get started graphing f(x) = x^2 - 6x + 8

I need help with this problem it says to graph f(x)=x^2-6x+8.What are the roots of x^2-6x+8 What I know is to find the x-intersept of the graph of each function. but i don't know how to do this problem

I would appreciate if someone would help me Thank you

Have you tried factoring?

Hint: (-2)*(-4) = +8