A Quadratic Function Is Given $f ( x ) = 2 x ^ { 2 } + 8 x + 9$

question 80

Essay

A quadratic function is given.
(a) Express the quadratic function in standard form.
(b) Find its vertex and its x- and y-intercept(s).
$f ( x ) = 2 x ^ { 2 } + 8 x + 9$

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Definitions:

Interest Rates

The cost of borrowing money or the return on invested funds, typically expressed as a percentage of the principal.

Investment Spending

Expenditure on physical assets like machinery, buildings, or equipment, intended to create future benefits.

Hyperinflation

An extremely high and typically accelerating rate of inflation, often exceeding 50% per month, leading to a rapid erosion of the real value of local currency.

Discount Rate

The interest rate charged by central banks to financial institutions for short-term loans, influencing monetary policy.