Solve the Equation by Making an Appropriate Substitution $5 x ^ { - 2 } - 6 x ^ { - 1 } + 1 = 0$

Multiple Choice

Solve the equation by making an appropriate substitution.
- $5 x ^ { - 2 } - 6 x ^ { - 1 } + 1 = 0$

A) $\{ 1,5 \}$
B) $\left\{ - \frac { 1 } { 5 } , - 1 \right\}$
C) $\{ - 1 , - 5 \}$
D) $\left\{ \frac { 1 } { 5 } , 1 \right\}$