Use the Quadratic Formula to Solve the Equation $$\mathrm { y } ^ { 2 } - 18 \mathrm { y } + 81 = 0$$

question 116

Multiple Choice

Use the quadratic formula to solve the equation.
- $$\mathrm { y } ^ { 2 } - 18 \mathrm { y } + 81 = 0$$

• A) \(\{ - 9,9 \}\)
• B) \(\{ - 9 - i , - 9 + i \}\)
• C) \(\{ - 9 \}\)
• D) \(\{ 9 \}\)

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Definitions:

Network

A series of stations or devices connected by some type of communications medium.

Repeater

A device in telecommunications that receives a signal and retransmits it at a higher level or higher power, or onto the other side of an obstruction, so that the signal can cover longer distances without degradation.

Device Bus Networks

Systems of communication protocols and pathways that allow for data and control signal exchange among various devices and components in a computer or automation system.

Pushbuttons

Manual control devices that, when pressed, can complete or break an electrical circuit to initiate some action or process.