Replace the brackets with parentheses and your answer will be accepted. However, if you try to enter the answer with brackets, the problem says there are more parts to the problem. For example, a hint may display the correct answer with brackets (shown below). The second case involves the use of brackets. Use parentheses to show the evaluator which part of the problem to evaluate first. To fix this, use parentheses! If you enter "1/(2p)", the evaluator has no choice but to use "2p" as the denominator, as shown in the hint. That is not the same as the correct answer specified in the hints. So it will evaluate "1/2", then multiply the result by "p". Remember PEMDAS? The expression as entered is equivalent to "1/2×p". The answer is in the order of operations. When the user enters "1/2p", the answer is marked as incorrect. In the first case, for example, a hint might show that the correct answer is:
The appearance of square brackets ( ) is the most common cause of this instance of the problem.
There are three reasons this situation might arise: (We assume they'll look through the hints when an answer is unknown or marked as incorrect.) When working on math exercises that involve entering an expression, students occasionally report that they cannot enter a correct expression, even though the answer they've entered is the one shown in the hints.
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