Factor Using the Ac-Method $21 x ^ { 2 } - 91 x - 70$

question 94

Multiple Choice

Factor using the ac-method.
- $21 x ^ { 2 } - 91 x - 70$

• A) \(( 21 x + 14 ) ( x - 5 )\)
• B) prime
• C) \(7 ( 3 x + 2 ) ( x - 5 )\)
• D) \(7 ( 3 x - 2 ) ( x + 5 )\)

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Definitions:

Income Elasticity

A measure of how much the demand for a good or service changes in response to a change in income.

Inferior Good

A good for which a rise in income decreases the demand for the good.

Income Elasticity

A measure of how much the quantity demanded of a good changes in response to a change in consumers' income.

Peanut Butter

A food paste or spread made from ground, dry-roasted peanuts, often used as a sandwich filling or ingredient in various recipes.