Write the equation of the graph shown below in factored form.

a. f(x)=(x-2)^2(x+1)(x-3)

b. f(x)=(x+2)^2(x-1)(x+3)

c. f(x)=(x+2)^2(x+1)(x+3)

d. f(x)=(x+2)^2(x-1)(x-3)