Perform the Indicated Operation $( \sqrt { 7 } + 5 \mathrm { i } ) ( \sqrt { 7 } - 5 \mathrm { i } )$

question 257

Multiple Choice

Perform the indicated operation. Write the result in the form a + bi.
- $( \sqrt { 7 } + 5 \mathrm { i } ) ( \sqrt { 7 } - 5 \mathrm { i } )$

• A) \(7 - 2 i \sqrt { 5 }\)
• B) \(7 - 25 \mathrm { i }\)
• C) \(- 18 + 0 \mathrm { i }\)
• D) \(32 + 0 \mathrm { i }\)

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