no
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you don't need to make them. Just solve the problem, then ignore whether its negative or positive, and you have your answer.
30. In math, if a problem asks for the absolute value of a number, it'll always be the positive form of that number.
brackets
The absolute value of a number can be represented by vertical lines by the side of each number. For example, the absolute value of -3 would be represented by |-3| .
Parentheses and brackets work the same in math as they do in writing -- use them to group ideas.