Multiply
- $$( 9 x - y ) ^ { 2 }$$

question 369

Multiple Choice

Multiply.
- $$( 9 x - y ) ^ { 2 }$$

• A) \(81 x ^ { 2 } - 9 x y + y ^ { 2 }\)
• B) \(81 x ^ { 2 } + y ^ { 2 }\)
• C) \(81 x ^ { 2 } - 18 x y - 2 y ^ { 2 }\)
• D) \(81 x ^ { 2 } - 18 x y + y ^ { 2 }\)

---

Definitions:

Trainees' Reactions

The initial responses or feedback from participants in a training program, often gauged to assess their engagement and the effectiveness of the training.

Questionnaires

A research instrument consisting of a series of questions and other prompts for the purpose of gathering information from respondents, widely used in surveys and studies.

Focus Groups

A qualitative research method where a small group of people discuss certain topics under the guidance of a moderator, used for exploring perceptions and opinions.

Interviews

A method of gathering information, feedback, or data by asking questions directly to individuals in a one-on-one or small group setting.