To find the area of a rectangle, you multiply the length by the width. In this case, Hiram's blanket measures 55 inches by 43 inches, so the area can be calculated using the expression:
\[ \text{Area} = 55 \times 43 \]
None of the provided options directly represent multiplication of 55 and 43, but the correct way to express the area in the context of the answers given would involve multiplying these dimensions.
However, if we analyze the given responses, none of them correctly represent the area calculation using multiplication. They all involve adding or subtracting squared values.
If you were looking for a simplification related conceptually to finding an area, something like \( 55 \times 43 \) can sometimes be expressed in other algebraic forms, but none of these options are valid expressions for calculating the area of the blanket.
In conclusion, the correct expression to find the area of the blanket is \( 55 \times 43 \), which is not represented in the provided options.