\"\"

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The expression is \"\".

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\"\"            (Substitute x = 7.1,  y = –2.5)

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\"\"                     (Product of two same signs is positive)

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\"\"                           (Subtract: \"\")

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To subtract -5.2 means add 5.2

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\"\"                                 (Product of two same signs is positive)

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\"\"                                          (Add: 2.5 + 5.2 = 7.7)\"\"

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The value of expression is 7.7.