Ans: D
$\begin{array}{cl}
& \dfrac{(6x^7)^2}{4x^5} \\
= & \dfrac{36x^{7\times 2}}{4x^5} \\
= & \dfrac{9x^{14}}{x^5} \\
= & 9 x^{14 – 5} \\
= & 9x^9
\end{array}$
$\begin{array}{cl}
& \dfrac{(6x^7)^2}{4x^5} \\
= & \dfrac{36x^{7\times 2}}{4x^5} \\
= & \dfrac{9x^{14}}{x^5} \\
= & 9 x^{14 – 5} \\
= & 9x^9
\end{array}$
