Find remainder when $ 30x $ is divided by $ 18 $.

The synthetic division table is:

$$ \begin{array}{c|rr}0&30&0\\& & \color{black}{0} \\ \hline &\color{blue}{30}&\color{orangered}{0} \end{array} $$

The remainder when $ 30x $ is divided by $ x $ is $ \, \color{red}{ 0 } $.

We can find remainder using synthetic division method.

Step 1 : Write down the coefficients of the dividend into division table.Put the zero at the left.

$$ \begin{array}{c|rr}\color{blue}{0}&30&0\\& & \\ \hline && \end{array} $$

Step 1 : Bring down the leading coefficient to the bottom row.

$$ \begin{array}{c|rr}0&\color{orangered}{ 30 }&0\\& & \\ \hline &\color{orangered}{30}& \end{array} $$

Step 2 : Multiply by the number on the left, and carry the result into the next column: $ \color{blue}{ 0 } \cdot \color{blue}{ 30 } = \color{blue}{ 0 } $.

$$ \begin{array}{c|rr}\color{blue}{0}&30&0\\& & \color{blue}{0} \\ \hline &\color{blue}{30}& \end{array} $$

Step 3 : Add down last column: $ \color{orangered}{ 0 } + \color{orangered}{ 0 } = \color{orangered}{ 0 } $

$$ \begin{array}{c|rr}0&30&\color{orangered}{ 0 }\\& & \color{orangered}{0} \\ \hline &\color{blue}{30}&\color{orangered}{0} \end{array} $$

Remainder is the last entry in the bottom row $ \left(\color{red}{ 0 }\right) $.

Synthetic Division Calculator