Solve the Equation in the Real Number System $x ^ { 4 } - 21 x ^ { 2 } - 100 = 0$

question 121

Multiple Choice

Solve the equation in the real number system.
- $x ^ { 4 } - 21 x ^ { 2 } - 100 = 0$

• A) \(\{ - 5,5 \}\)
• B) \(\{ - 5 , - 2,2,5 \}\)
• C) \(\{ - 10,10 \}\)
• D) \(\{ - 2,2 \}\)

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Definitions:

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