To find the side length of the square, we can take the square root of the area:
![\sqrt{256in^(2)} =16in](https://img.qammunity.org/2019/formulas/mathematics/middle-school/nnhm5fl14qo9xix19ltf1sklo6frctxgfb.png)
So if the rectangular mirror has a width the same as the square, the width will be 16in.
If the length is two inches longer than the width, the length will be 18 in.
So to find the area, we must multiply them:
![16in*18in=284in^(2)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/s2okclg8gvick7oec6khelkj904wbw80ca.png)
So now we know that the area of this rectangular mirror is 284 sq. inches.