Solve the Equation by Making an Appropriate Substitution $$\left( x ^ { 2 } - 2 x \right) ^ { 2 } - 23 \left( x ^ { 2 } - 2 x \right) + 120 = 0$$

question 377

Multiple Choice

Solve the equation by making an appropriate substitution.
- $$\left( x ^ { 2 } - 2 x \right) ^ { 2 } - 23 \left( x ^ { 2 } - 2 x \right) + 120 = 0$$

• A) \(\{ - 3 , - 2,5,4 \}\)
• B) \(\{ 15,8 \}\)
• C) \(\{ 5,4 \}\)
• D) \(\{ - 3 , - 2,15,8,5,4 \}\)

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