Evaluate a b² for a = 2 and b = 3

To evaluate the expression a b² where a = 2 and b = 3, we start by substituting the values into the expression.

First, we need to calculate b²:
b² = 3² = 3 * 3 = 9.

Now, we have:
a b² = 2 * 9 = 18.

Thus, the final result for a b² when a = 2 and b = 3 is 18.