[tex]\begin{gathered} \\ \frac{x^{\square}}{x^4}=x^2 \\ \text{cross multiply} \\ ^{}x^{\square}=x^4.x^2 \\ \text{applying the laws of indices} \\ x^{\square}=x^{4\text{ + 2}} \\ x^{\square}=x^6 \end{gathered}[/tex]
From the solution above, the missing exponent is 6
