Evaluate the Expression $- ( 1 - \sqrt { - 2 } ) + ( 1 - ( \sqrt { - 1 } - \sqrt { - 2 } ) )$

question 21

Multiple Choice

Evaluate the expression $- ( 1 - \sqrt { - 2 } ) + ( 1 - ( \sqrt { - 1 } - \sqrt { - 2 } ) )$ and write the result in the form $a + b i$ .

• A) \(i ( 2 \sqrt { 2 } - 1 )\)
• B) \(0 + i ( 2 \sqrt { 2 } - 1 )\)
• C) \(2 \sqrt { 2 } - 1\)
• D) \(2 \sqrt { 2 } - i\)
• E) \(1 - \sqrt { 2 } i\)

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Definitions:

Labor Rate Variance

The difference between the actual labor costs incurred and the expected or standard labor costs for the production volume achieved.

Direct Labor

Labor costs directly associated with the production of goods or services, involving work that can be directly traced back to specific products.

Direct Materials Price Variance

A measurement of the difference between the actual cost of direct materials and the standard cost expected to be paid, expressed in monetary terms.

Direct Materials Quantity Variance

A measure of the difference between the actual quantity of materials used in production and the standard amount expected, valued at the standard cost.