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What do you use to remove any grouping symbols in math

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  1. 9 March, 14:30
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    When we remove those parentheses, the sign of every term

    within the parentheses changes.

    Problem 2. Remove the parentheses.

    a) p + (q - r + s) = p + q - r + s

    b) p - (q - r + s) = p - q + r - s

    In each of the following problems, remove the parentheses, then simplify

    by adding the numbers.

    For example,

    (x - 3) - (y - 4) = x - 3 - y + 4 = x - y + 1.

    The sign preceding (x - 3) is understood to be +. Therefore the signs within those parentheses do not change.

    But the sign preceding (y - 4) is minus. Therefore, y changes to - y, and - 4 changes to + 4.

    Finally, it is the style in algebra to to write the literal terms, x - y, to the left of the numerical term.
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