The tightening of a square is find the area of the square

Given:
The side length of the square
[tex]=3x^2[/tex]Required:
To find the area of the square.
Explanation:
The area of the square is given by the formula:
[tex]A=(side)^2[/tex]Thus the area of the square
[tex]\begin{gathered} A=(3x^2)^2 \\ A=9x^4 \end{gathered}[/tex]Final Answer:
Thus the second option is the correct answer.