Consider Only the Discriminant $b ^ { 2 } - 4 a c$

question 81

Multiple Choice

Consider only the discriminant, $b ^ { 2 } - 4 a c$ to determine whether one real-number solution, two different real-number
solutions, or two different imaginary-number solutions exist.
- $$7 x ^ { 2 } = 21 x$$

• A) 3
• B) \(10.5\)
• C) 7,3
• D) 0,3

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Definitions:

Amplitude

The height or magnitude of a wave signal, illustrating the intensity or level of fluctuation.

Pitch

The perception of how high or low a sound is, fundamentally related to the frequency of the sound wave.

Brightness And Loudness

Terms describing the perception of the intensity of light and sound, respectively, with brightness relating to visual perception and loudness to auditory perception.

Colour And Timbre

Attributes of sound and light; color refers to the visual property determined by wavelength, and timbre to the quality of a sound that distinguishes different types of sound production.