Answer:
A
Step-by-step explanation:
A is not a polynomial as the power of x is less than one
Hey can you take another pic
Answer below as attachment. m=520
-2 because in the second equation it is : 2x. If you multiply x in the first equation by -2 it will cancel out 2x in the second equation. -2x cancels out 2x. -2x+2x=0