Final answer:
When x > 0, the equivalent product is 0.25 * (0.25 + x).
Step-by-step explanation:
When calculating a product, we can simplify the expression by substituting a small value in place of the variable. In this case, the expression is (0.25 - x)(0.25 + x). Since x is small relative to 0.25, we can replace (0.25 - x) with 0.25. Simplifying the expression gives us 0.25 * (0.25 + x).
So, the choice is equivalent to the given product when x > 0 is 0.25 * (0.25 + x).