help with curve sketching, i have a question how do u sketch this,

y= (x-2)^3

i know u have to find the roots, but if u get (x-2), isn't the root 2, and it goes through a curve because of its to the power of 3?

also one question consider this exmaple. y= -5 (x+5) (x-5), would the -5 consider as a root or 0?, and also if a questions like this

y = -(x^2-25)(x^-1), would the negative sign be consider the graph as negative parabola? or would the negative sign be ignored?