Multiply, and Then Simplify If Possible $( \sqrt { 7 } - \sqrt { 3 } ) ^ { 2 }$

question 31

Multiple Choice

Multiply, and then simplify if possible. Assume all variables represent positive real numbers.
- $( \sqrt { 7 } - \sqrt { 3 } ) ^ { 2 }$

• A) \(21 - 2 \sqrt { 21 }\)
• B) \(10 - 2 \sqrt { 21 }\)
• C) \(10 + 2 \sqrt { 21 }\)
• D) \(4 - 2 \sqrt { 21 }\)

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Definitions:

Obscure

Not clearly understood or expressed; lacking clarity or distinctness, often resulting in being unknown or little known.

Wait List Control Group

In a therapy outcome study, group of people that functions as a control group while an experimental group receives an intervention and then receives the intervention itself after a waiting period.

Experimental Group

In an experimental study, group of participants that receive the key manipulation.

Therapy Outcome

The end result or effectiveness of a therapeutic intervention, usually measured in terms of patient improvement or symptom reduction.