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

question 27

Multiple Choice

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

• A) 42
• B) \(441 + 7 \sqrt { 3 }\)
• C) \(21 + 7 \sqrt { 3 }\)
• D) \(21 + 49 \sqrt { 3 }\)

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