Answer:
18 square units
Explanation:
The side length of the square, s = √18
For a square of side length s:
[tex]Area=s^2[/tex]Therefore, the area of the given square:
[tex]\begin{gathered} A=(\sqrt[]{18})^2 \\ =18\text{ square units} \end{gathered}[/tex]The area of the given square is 18 square units.