Find AB and BA $A = \left[ \begin{array} { r r } 2 & - 2 \\ - 3 & 9 \end{array} \right]$

question 52

Multiple Choice

Find AB and BA.
- $A = \left[ \begin{array} { r r } 2 & - 2 \\ - 3 & 9 \end{array} \right]$ and $B = \left[ \begin{array} { l l } 1 & 0 \\ 0 & 1 \end{array} \right]$

• A) \(A B = \left[ \begin{array} { r r } 2 & - 2 \\ - 3 & 9 \end{array} \right] ; B A = \left[ \begin{array} { r r } 2 & - 3 \\ - 2 & 9 \end{array} \right]\)
• B) \(A B = \left[ \begin{array} { l l } 2 & 0 \\ 0 & 9 \end{array} \right] ; B A = \left[ \begin{array} { l l } 2 & 0 \\ 0 & 9 \end{array} \right]\)
• C) \(A B = \left[ \begin{array} { r r } 2 & - 2 \\ - 3 & 9 \end{array} \right] ; B A = \left[ \begin{array} { r r } 2 & - 2 \\ - 3 & 9 \end{array} \right]\)
• D) \(A B = \left[ \begin{array} { l l } 1 & 0 \\ 0 & 1 \end{array} \right] ; B A = \left[ \begin{array} { l l } 1 & 0 \\ 0 & 1 \end{array} \right]\)

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Definitions:

Social Psychological Research

The study of how people's thoughts, feelings, and behaviors are influenced by the actual, imagined, or implied presence of others.

Self-Esteem

Someone's internal judgment of their value, involving both their self-concept and feelings.

Exchange Relationships

Social relationships where the mutual exchange of goods, services, favors, or other benefits is the foundation and expectation of the interaction.

Communal Relationships

Social connections in which individuals emphasize mutual care and concern for each other's welfare.