Math Help - Evaluating a limit

1. Evaluating a limit

I am stuck on how to finish this evaluating this limit . Can someone show me how l can further simplify this thing inorder to get the final answer.

Note :The question and attempt to the question are on the image l attached

2. Originally Posted by nyasha
I am stuck on how to finish this evaluating this limit . Can someone show me how l can further simplify this thing inorder to get the final answer.

Note :The question and attempt to the question are on the image l attached
What about strarting by taking $x^3$ as common factor in the numerator?