Answer:
8x^2 - x.
Explanation:
The area of a rectangle is calculated by multiplying its length and width. Given that the length of the rectangle is -8x+1 and the width is -x, the area of the rectangle can be calculated as follows:
Area = Length x Width = (-8x+1) x (-x) = 8x^2 - x
Therefore, the area of the rectangle is 8x^2 - x.