Write the sets of points from -2 to 5 but exluding 2 and 5 as a union of intervals

we are given

to write the sets of points from -2 to 5 but excluding 2 and 5 as a union of intervals

so, first interval is

-2 to 2 by excluding 2

[-2,2)

Second  interval is

2 to 5 by excluding 2 and 5

so, we can write as

(2,5)

now, we can find total interval

we get

[-2,2) ∪ (2,5)Answer

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