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Multiply, and Then Simplify If Possible 7(63+21)\sqrt { 7 } ( \sqrt { 63 } + \sqrt { 21 } )

question 27

Multiple Choice

Multiply, and then simplify if possible. Assume all variables represent positive real numbers.
- 7(63+21) \sqrt { 7 } ( \sqrt { 63 } + \sqrt { 21 } )


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