(2x + 3) (x – x)

The top tiles represent 2x + 3, while the tiles on the left represent x – x.

All the tiles between them, is the answer to the equation that was made.

Since there are two and two that would make two zero pairs, which would make that part zero.

And then there are three x’s and three -x’s , which would make three more zero pairs, and again, make that part zero, so the overall answer of the equation would be zero because (x – x) was zero, and that gets multiplied, which would always make the answer zero.