If a = 4, then (3a)^2 - 3a^2 =?
- 48
- 16
- 96
- 144
Explanation
If a = 4, then (3a)^2 - 3a^2 is calculated as follows:
(3a)^2 - 3a^2 = (3 x 4)^2 - 3 x 4^2 =
12^2 - 3 x 16 = 144 - 48 = 96
So the answer is 96.
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