Factor the Expression Over the Set of Complex Numbers $9 a ^ { 2 } + 16$

question 90

Multiple Choice

Factor the expression over the set of complex numbers $9 a ^ { 2 } + 16$

• A) \(\quad ( - 3 a + 4 i ) ( - 3 a + 4 i )\)
• B) \(\quad ( 3 a + 4 i ) ( 3 a - 4 i )\)
• C) \(\quad ( 3 a + 4 ) ( 3 a - 4 )\)
• D) \(\quad ( 3 + 4 i ) ( 3 - 4 i )\)
• E) \(\quad ( 3 a + 4 i ) ( 3 a + 4 i )\)

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