Final answer:
To simplify the expression ab when a>0 and b>0, multiply a and b together.
Step-by-step explanation:
To simplify the expression ab when a>0 and b>0, we multiply a and b together.
For example, if a = 3 and b = 13, the simplified expression would be 3 x 13 = 39.
Therefore, when a>0 and b>0, the simplified expression ab is equal to the product of a and b.