You can remove parenthesis or bracket by multiplying the number outside, with the number inside the bracket.
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Yes, when there are parenthesis in an equation, you have to use the distibutive property.
Eliminate them from the equation. Note: This must be accomplished through the use of legitimate algebraic operations. Erasure is not permitted.
Do the work inside the parenthesis first.
The associative property in algebra is important for organization of numbers. Rearranging the numbers and parenthesis will not change values but instead make the equation more convenient.
(3x3+1)2+1=7x2+1=15 and that is how you use parenthesis but, always do parenthesis before you do anything else......^_^