Let's take a look at the equation you gave:
To find the y-intercept you set in the equation and this will give you the y co-ordinate of the point where f(x) crosses the y-axis.
so i.e. crosses the y-axis at the point (0,10).
To find the x-intercept you set , i.e.
The easiest way to do this is to factorise:
(If factorising doesn't work use the quadratic formula .)
So crosses the x-axis at the points (2,0) and (5,0).