Completely Factor the Expression Below $3 u + 7 u ^ { 2 } + 21 + u ^ { 3 }$

question 87

Multiple Choice

Completely factor the expression below. $3 u + 7 u ^ { 2 } + 21 + u ^ { 3 }$

• A) \(( u + 7 ) \left( 3 - u ^ { 2 } \right)\)
• B) \(( u + 7 ) \left( 3 + u ^ { 2 } \right)\)
• C) \(\left( u ^ { 2 } - 7 \right) ( 3 + u )\)
• D) \(\left( u ^ { 2 } - 7 \right) ( 3 - u )\)
• E) \(\left( u ^ { 2 } + 7 \right) ( 3 - u )\)

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