Perform the Indicated Operation $( - 9 + 2 i ) - 4$

question 326

Multiple Choice

Perform the indicated operation. Write the result in the form a + bi.
- $( - 9 + 2 i ) - 4$

• A) \(- 13 + 2 \mathrm { i }\)
• B) \(- 5 - 2 \mathrm { i }\)
• C) \(13 - 2 \mathrm { i }\)
• D) \(- 5 + 2 i\)

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Definitions:

Noise

Unwanted sound that is loud, unpleasant, or causes disturbance.

Correlational Study

A type of research design where the relationship between two variables is examined, without determining cause and effect.

Independent Variable

The factor in an experiment that the researcher alters or controls to see how it impacts the dependent variable.

Independent Variable

A variable in an experiment that is manipulated or changed by the researcher to observe its effects on the dependent variable.