We are given the three sides of a triangle with the following expressions for their lengths:
- \( (2x - 1) \)
- \( (7 - x)(7 - x) \)
- \( (x + 3)(x + 3) \)
To compare the two quantities, we need to solve for the value of \( x \) and determine the side lengths. However, the values of \( x \) are not specified, and there could be multiple solutions for \( x \), resulting in different side lengths. Without knowing the value of \( x \), we cannot definitively determine the relationship between the two quantities.
Final Answer:
\[
\boxed{\text{The relationship cannot be determined from the information given.}}
\]