Answer :
ANSWER
[tex]\begin{equation*} 16x^3 \end{equation*}[/tex]EXPLANATION
Given;
[tex]\frac{5}{x^3},\:\frac{15}{16x^2}[/tex]To find the L.C.D, we need to find the least common multiple of the denominator.
Hence, the LCM of the denominator is;
[tex]16\times x^3=16x^3[/tex]