Solve the Logarithmic Equation $\log _ { 7 } x ^ { 2 } = \log _ { 7 } ( 8 x + 9 )$

Multiple Choice

Solve the logarithmic equation. Be sure to reject any value that is not in the domain of the original logarithmic
expressions. Give the exact answer.
- $\log _ { 7 } x ^ { 2 } = \log _ { 7 } ( 8 x + 9 )$

A) $\{ 9 , - 1 \}$
B) $\{ 9 \}$
C) $\left\{ \frac { 9 } { 7 } \right\}$
D) $\varnothing$