Solve the Equation $\log _ { 20 } \left( x ^ { 2 } - x \right) = 1$

Multiple Choice

Solve the equation.
- $\log _ { 20 } \left( x ^ { 2 } - x \right) = 1$

A) $\{ - 4,5 \}$
B) $\{ 4,5 \}$
C) $\{ - 4 , - 5 \}$
D) $\{ 1,20 \}$