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Multiply and Simplify the Expression $\sqrt { 5 } \sqrt { 21 }$

Question 57

Multiple Choice

Multiply and simplify the expression $\sqrt { 5 } \sqrt { 21 }$ .

A) 105
B) $\sqrt { 105 }$
C) $\sqrt { 5 } + \sqrt { 21 }$
D) $\sqrt { 21 }$
E) $\sqrt { 5 }$

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