Answer:
[tex]h^3-h^2k-hk^2+k^3[/tex]
Step-by-step explanation:
[tex]\dfrac{4h}{h^2-k^2}=\dfrac{4h(h-k)}{(h-k)(h+k)(h-k)}\\\\\dfrac{5}{h^2-2hk+k^2}=\dfrac{5(h+k)}{(h-k)^2(h+k)}\\\\\text{The common denominator is ...}\\\\(h-k)^2(h+k)=\boxed{h^3-h^2k-hk^2+k^3}[/tex]
