A student is completing a mathematics coursework investigation using a 100-square.

They place a square of length 3 at a random place on the grid.

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They then multiply the opposite diagonal corners and find the difference between them, this is known as the diagonal difference.

For example: `43xx²5-45xx²3=40`.

Wherever the rectangle is placed on the 100-square the diagonal difference will always be 40.

True of false?

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