Linear Algebra For Dummies
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When performing more than one operation on an algebraic expression, you must use the different operations in a precise order. Grouping symbols, such as parentheses and brackets, can interrupt the order of operations. The order of operations is listed here:

  1. Powers or roots

  2. Multiplication or division

  3. Addition or subtraction

If an operation appears more than once in an expression, perform that operation from left to right.

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