(a-x)²

The expression \((a - x)^2\) represents the square of the binomial \(a - x\). To expand this expression, you can use the binomial theorem or simply apply the formula for the square of a difference:

\[ (a - x)^2 = a^2 - 2ax + x^2 \]

So, the expanded form of \((a - x)^2\) is:

\[ a^2 - 2ax + x^2 \]