Changes

:x = 1 = y

:x = 1 = y

Then do not forget to include the maximum area in your answer, which is ''f(1,1) = 4(1)(1) = 4.

Then do not forget to include the maximum area in your answer, which is <math>f(1,1) = 4 \cdot 1 \cdot 1 = 4</math>.

[[Category:calculus]]

[[Category:calculus]]

[[Category:mathematics]]

[[Category:mathematics]]