Answer:
the largest is: [tex]C^2+D^2[/tex]
Step-by-step explanation:
We are given the expression C>D>0.
As C and D represent two different school populations. This means that C and D will be natural numbers.
C+D<2×(C+D)
Also [tex]C^2+D^2>C^2-D^2[/tex].
the largest among these expressions is [tex]C^2+D^2[/tex]