Solve the Equation by Making an Appropriate Substitution $x ^ { 2 / 5 } - x ^ { 1 / 5 } - 20 = 0$

question 168

Multiple Choice

Solve the equation by making an appropriate substitution.
- $x ^ { 2 / 5 } - x ^ { 1 / 5 } - 20 = 0$

• A) \(\{ 3125 , - 1024 \}\)
• B) \(\{ - 3125,1024 \}\)
• C) \(\{ 5 , - 4 \}\)
• D) \(\{ - 5,4 \}\)

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