(A/b)2

The expression \((A/b)^2\) represents the square of the fraction \(\frac{A}{b}\). To simplify it, you would raise both the numerator and the denominator to the power of 2.

Thus, \((A/b)^2\) can be expressed as:

\[ \frac{A^2}{b^2} \]

So the final result is:

\[ \frac{A^2}{b^2} \]