Rewrite the Quadratic Function in Standard Form by Completing the Square

question 154

Multiple Choice

Rewrite the quadratic function in standard form by completing the square.
- $$f ( x ) = x ^ { 2 } - 18 x$$

• A) \(f ( x ) = ( x + 18 ) ^ { 2 } - 18\)
• B) \(f ( x ) = ( x - 18 ) ^ { 2 } - 324\)
• C) \(f ( x ) = ( x + 9 ) ^ { 2 } - 9\)
• D) \(f ( x ) = ( x - 9 ) ^ { 2 } - 81\)

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Definitions:

Gyrus

A ridge on the cerebral cortex; gyri are the "bumps" that can be seen on the surface of the brain.

Meningitis

An acute inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges, which can be caused by infection with viruses, bacteria, or other microorganisms, and in some cases by certain drugs.

Convulsions

Involuntary, rapid, and uncontrollable muscle contractions often caused by electrical disruptions in the brain.

CSF

Cerebrospinal Fluid; a clear, colorless body fluid found in the brain and spinal cord, providing cushioning and maintaining a stable environment for the central nervous system.