If i travel 12 miles in 1/3 of an hour. what is my speed

36 miles per hour (mph)

We have 12 miles traveled in 1/3 of an hour

Multiply both values by 3 so that the "1/3 hr" becomes "1 hr"

12*3 = 36

(1/3)*3 = 1

So you travel 36 miles in one hour, ie your speed is 36 miles per hour.

You can use this ratio to help

12 miles : 1/3 hr

3*(12 miles) : 3*(1/3) hr

36 miles : 1 hr

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