Solve the Equation by Making an Appropriate Substitution $$x ^ { - 2 } - x ^ { - 1 } - 30 = 0$$

question 345

Multiple Choice

Solve the equation by making an appropriate substitution.
- $$x ^ { - 2 } - x ^ { - 1 } - 30 = 0$$

• A) \(\left\{ \frac { 1 } { 6 } , - \frac { 1 } { 5 } \right\}\)
• B) \(\left\{ - \frac { 1 } { 6 } , \frac { 1 } { 5 } \right\}\)
• C) \(\{ 6 , - 5 \}\)
• D) \(\{ - 6,5 \}\)

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Pixel

A single point that creates the images on a computer monitor. Pixels are illuminated by an electron beam that passes rapidly back and forth across the back of the screen so that the pixels appear to glow continuously.

Hertz

A unit of frequency equal to one cycle per second, used to measure the frequency of oscillations and vibrations.

Bit

The most basic unit of data in computing and digital communications, which can have a value of either 0 or 1.

Ppm

Parts per million, a unit of measurement used to describe the concentration of a substance in a mixture or solution.