Answer
$Q(x)=3,\quad R(x)=20x+5$
Work Step by Step
$ \left.\begin{array}{l}
\\
3x^{2}-7x\ )\\
\\
\\
\\
\end{array}\right. \begin{array}{rrrrr}
3 & & & & \\
\hline 9x^{2} & -x & +5 & & \\
9x^{2} & -21x & & & \\
-- & -- & -- & & \\
& 20x & +5 & &
\end{array} $
$Q(x)=3,\quad R(x)=20x+5$