Amita decides that she wants the molds to have a square base how many of the possible mold can she use

The equation that represents x as the side length of the greater square is x2 + 2x2 = 100. The square, which is 10 by 10 in grid, has a total of 100 squares. The statement  “one should have a side length two” means that there is 2X and the other statement greater than the other means that 2x2.

the answer will be

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol