Identify if equations are functions or not functions (see photo) sort them out please

B AND B Because they are the only awnsers that make grammatical sense.

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!