Solve by Completing the Square $$x ^ { 2 } = 7 - 8 x$$

question 18

Multiple Choice

Solve by completing the square.
- $$x ^ { 2 } = 7 - 8 x$$

• A) \(- 4 \pm \sqrt { 23 }\)
• B) \(4 + \sqrt { 23 }\)
• C) \(- 4 \pm 2 \sqrt { 23 }\)
• D) \(- 1 \pm \sqrt { 23 }\)

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Definitions:

Four-firm Concentration Ratio

A measurement that indicates the combined market share of the four largest firms in an industry, used to assess the degree of competition within the market.

Herfindahl Index

A measure of market concentration that is used to determine the amount of competition among firms within an industry.

Import Competition

The competition between domestic products and foreign products in a domestic market, affecting local industries.

Herfindahl Index

A measure of the concentration of industries or markets, calculated as the sum of the squares of the market shares of the largest firms, used to assess the extent of competition.