\"\"

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The expression is \"\".

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\"\"         (Substitute: a = 48 and b = 12) \ \

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\"\"                       (Add: \"\")

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Factor using greatest perfect square factor.

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\"\"

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\"\"              (Product property of square roots: \"square)

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\"\"               (Write \"\")

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\"\"                    (Cancel square and root) \ \

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\"\"

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 The solution is \"\". \ \