Solve the Equation by Making an Appropriate Substitution $$x ^ { - 2 } + x ^ { - 1 } - 6 = 0$$

question 309

Multiple Choice

Solve the equation by making an appropriate substitution.
- $$x ^ { - 2 } + x ^ { - 1 } - 6 = 0$$

• A) \(\{ - 3,2 \}\)
• B) \(\left\{ - \frac { 1 } { 3 } , \frac { 1 } { 2 } \right\}\)
• C) \(\{ 3 , - 2 \}\)
• D) \(\left\{ \frac { 1 } { 3 } , - \frac { 1 } { 2 } \right\}\)

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