Given the follow:
Root96 - root54 + root24
We are to find the expression that is equivalent.
root96 = root16 x root6
root54 = root9 x root6
root24 = root4 x root6
(root16 x root6) - (root9 x root6) + (root4 x root6)
= 4root6 - 3root6 + 2root6
= (4 - 3 + 2)root6
= (1 + 2)root6
= 3root6
Therefore, the correct option is C which is 3root6