human
Divide algebraic fractions involving non-linear expressions STEP \( 2 \)
Which of the options is a correct second step to express the following as a single fraction?

\(
\begin{aligned}
& \frac{x-1}{6} \div \frac{x^{2}-1}{9} \\
= & \frac{x-1}{6} \times \frac{9}{x^{2}-1}
\end{aligned}
\) \( \frac{9 x-1}{6 x^{2}-1} \)
gpt
Answers order of operations questions with brackets as if the brackets are not there