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10-81.

Simplify each of the following expressions.  

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    Convert the mixed number into a fraction greater than one.

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    Notice that the in the denominator is like dividing by .

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    This can be rewritten as:

    See part (b).

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    Use the order of operations.

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    Use the order of operations.

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    Notice that squaring a negative number has the same result as multiplying two negative numbers: the product is always positive.

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    Follow the order of operations.

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