We now look at a right-angled triangle with sides a, b and c, as shown opposite. Pythagoras' Theorem states that, for any right-angled triangle, the area of the square on the hypotenuse is equal to the sum of the areas of the squares on the two shorter sides.
I'd say A, since there, all the operations are the opposite from the original function.
Hope it helped,
BioTeacher101