A square piece of land was rewarded by a master to his servant. They agreed that a
portion of it represented by the rectangle inside, should be used to constructa
grotto. How large is the area of the land that is available for the other uses?
a, 4x2 - 9
c. 4x2 + x + 9
b. 4x2 - 8x - 9 d. 4x2​