How many units left/right did this function shift?

answer: a.   one is a factor of every whole number since every number is divisible by itself.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!