Solve Equations That Are Quadratic in Form
Solve the Equation $$x ^ { 4 } - 20 x ^ { 2 } + 64 = 0$$

question 199

Multiple Choice

Solve Equations That Are Quadratic in Form
Solve the equation by making an appropriate substitution.
- $$x ^ { 4 } - 20 x ^ { 2 } + 64 = 0$$

• A) \(\{ - 2,2 , - 4,4 \}\)
• B) \(\{ 4,16 \}\)
• C) \(\{ 2,4 \}\)
• D) \(\{ - 2 \mathrm { i } , 2 \mathrm { i } , - 4 \mathrm { i } , 4 \mathrm { i } \}\)

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Definitions:

Buccinator

A muscle of the cheek, important in the action of chewing, blowing, and sucking.

Salivary Gland

Gland that produces and secretes saliva into the oral cavity. The three major pairs of salivary glands are the parotid, submandibular, and sublingual glands.

Facial Nerve

The seventh cranial nerve that controls the muscles of facial expression, taste sensation from the anterior two-thirds of the tongue, and supplies some glands.

Glossopharyngeal Nerves

The ninth pair of cranial nerves which are involved in tasting, swallowing, and the gag reflex.