Answer:
[tex]5x^{5}[/tex]
Step-by-step explanation:
So first, reduce the fraction with 3, 15/3 is 5.
[tex]\frac{5x^{3}x^{4} }{x^{2}}[/tex]
Then simplify it and get rid f the x^2 on the bottom, and x^3 reduces to just x
Leaving
[tex]5x*x^{4}[/tex]
And then you get [tex]5x^{5}[/tex]