Hello there!
By simplifying this expression, we would first have to (
find the roots which would be polynomial).
We would have to find the the polynomial root of 

After resolving this, we would then have to find the 
leading coefficient and also the
 trailing constant.
 = 
(1) _________

 = 
(1,2,4)This would be the result of the simplification of this expression listed above.
Therefore, your correct answer would be 

I hope this helps you!