Multiply Using One of the Rules for the Square of a Binomial

question 59

Multiple Choice

Multiply using one of the rules for the square of a binomial. Assume any variable exponents represent whole numbers.
- $( 7 x - y ) ^ { 2 }$

• A) \(49 x ^ { 2 } + y ^ { 2 }\)
• B) \(49 x ^ { 2 } - 14 x y - 2 y ^ { 2 }\)
• C) \(49 x ^ { 2 } - 7 x y + y ^ { 2 }\)
• D) \(49 x ^ { 2 } - 14 x y + y ^ { 2 }\)

Understand the usage of external devices for synchronization and measurement of alternator parameters.

Understand the basic principles of motor operation on different voltages.

Recognize the consequences and terminology related to line failures in three-phase motors.

Understand the effect of pole number alteration on motor speed.

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Definitions:

Economies Of Scale

Economies of scale are cost advantages reaped by companies when production becomes efficient, as the cost per unit of output decreases with the increase in scale of operation.

Natural Monopoly

An industry that realizes such large economies of scale that single-firm production of that good or service is most efficient.

Profit-Maximizing Price

The price at which a firm can sell its product to earn the maximum possible profit on those sales.

Marginal Revenue

The additional income from selling one more unit of a good; it is the change in total revenue from an additional unit sold.