$(6 x)^{2}$ simplified expression
So, the simplified expression of \((6x)^{2}\) is \(\boxed{36x^{2}}\).
Step 1 :The question is asking for the simplified expression of \((6x)^{2}\).
Step 2 :This can be simplified by applying the power of a product rule in mathematics, which states that the power of a product is the product of each factor raised to the power.
Step 3 :In this case, we can apply the rule to get \(6^{2} * x^{2}\).
Step 4 :So, the simplified expression of \((6x)^{2}\) is \(\boxed{36x^{2}}\).