Simplify the Expression $( - 5 + \sqrt { - 15 } ) ( 1 - \sqrt { - 15 } )$

question 15

Multiple Choice

Simplify the expression. Enter the answer in a + bi form. $( - 5 + \sqrt { - 15 } ) ( 1 - \sqrt { - 15 } )$

• A) \(10 - 6 \sqrt { 15 i }\)
• B) \(10 + 6 \sqrt { 15 i }\)
• C) \(- 20 + 6 \sqrt { 15 i }\)
• D) \(- 20 - 6 \sqrt { 15 } i\)

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