Solve the Equation by Making an Appropriate Substitution $$x ^ { - 2 } + 7 x ^ { - 1 } + 6 = 0$$

question 231

Multiple Choice

Solve the equation by making an appropriate substitution.
- $$x ^ { - 2 } + 7 x ^ { - 1 } + 6 = 0$$

• A) \(\left\{ - \frac { 1 } { 6 } , - 1 \right\}\)
• B) \(\left\{ \frac { 1 } { 6 } , 1 \right\}\)
• C) \(\{ 1,6 \}\)
• D) \(\{ - 1 , - 6 \}\)

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