Find the Following Product and Express Your Answer in Simplest $( 3 \sqrt { 7 } - 4 \sqrt { 21 } ) ( 5 \sqrt { 27 } + \sqrt { 21 } )$

question 37

Multiple Choice

Find the following product and express your answer in simplest radical form. $( 3 \sqrt { 7 } - 4 \sqrt { 21 } ) ( 5 \sqrt { 27 } + \sqrt { 21 } )$

• A) \(- 45 \sqrt { 21 } - 21 \sqrt { 3 } + 180 \sqrt { 7 } + 84\)
• B) \(45 \sqrt { 21 } - 21 \sqrt { 7 } - 180 \sqrt { 3 } + 84\)
• C) \(15 \sqrt { 3 } + 3 \sqrt { 7 } - 84\)
• D) \(45 \sqrt { 21 } + 21 \sqrt { 3 } - 180 \sqrt { 7 } - 84 \sqrt { 27 }\)
• E) \(45 \sqrt { 21 } + 21 \sqrt { 3 } - 180 \sqrt { 7 } - 84\)

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