Express the Quadratic Function in Standard Form $f ( x ) = 2 x ^ { 2 } + 8 x + 9$

question 37

Multiple Choice

Express the quadratic function in standard form. $f ( x ) = 2 x ^ { 2 } + 8 x + 9$

• A) \(f ( x ) = 2 ( x + 2 ) ^ { 2 } + 9\)
• B) \(f ( x ) = ( x + 2 ) ^ { 2 } + 2\)
• C) \(f ( x ) = 2 ( x + 1 ) ^ { 2 } + 1\)
• D) \(f ( x ) = 2 ( x + 1 ) ^ { 2 } + 2\)
• E) none of these

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Purchasing Power

How much goods or services can be bought with one unit of money, indicating the currency's value.

Real Interest Rates

This is the interest rate after inflation adjustment, demonstrating the true cost of loans or the actual gains from savings accounts.

Nominal Interest Rates

The interest rates before adjustments for inflation, indicating the gross return on financial investments or loans.

Inflation

The rate of increase in the general price index for goods and services, leading to a decrease in how much can be bought.