. What are the advantages of each method? Multiply by the reciprocal. And Find common denominators, then divide the numerators.

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

what chart am i supposed to follow?

they aren't great and cause destruction, idk man