Factor the Expression Over the Set of Complex Numbers $$25 a ^ { 2 } + 16$$

question 82

Multiple Choice

Factor the expression over the set of complex numbers $$25 a ^ { 2 } + 16$$

• A) \(\quad ( 5 a + 4 i ) ( 5 a - 4 i )\)
• B) \(\quad ( 5 + 4 i ) ( 5 - 4 i )\)
• C) \(\quad ( - 5 a + 4 i ) ( - 5 a + 4 i )\)
• D) \(\quad ( 5 a + 4 i ) ( 5 a + 4 i )\)
• E) \(\quad ( 5 a + 4 ) ( 5 a - 4 )\)