Standard form of -12/28

-3/7

Step-by-step explanation:

To simplify the fraction, simply divide by 4 on both the top and bottom. When you do so, you should get your answer in standard form.

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