Divide using synthetic division $$ ( 2x^{5}-2x^{3}-3 ) \div ( x+1 ) $$
Answer
The synthetic division table is:
$$ \begin{array}{c|rrrrrr}-1&2&0&-2&0&0&-3\\& & -2& 2& 0& 0& \color{black}{0} \\ \hline &\color{blue}{2}&\color{blue}{-2}&\color{blue}{0}&\color{blue}{0}&\color{blue}{0}&\color{orangered}{-3} \end{array} $$The solution is:
$$ \frac{ 2x^{5}-2x^{3}-3 }{ x+1 } = \color{blue}{2x^{4}-2x^{3}} \color{red}{~-~} \frac{ \color{red}{ 3 } }{ x+1 } $$Explanation
Step 1 : Write down the coefficients of the dividend into division table. Put the zero from $ x + 1 = 0 $ ( $ x = \color{blue}{ -1 } $ ) at the left.
$$ \begin{array}{c|rrrrrr}\color{blue}{-1}&2&0&-2&0&0&-3\\& & & & & & \\ \hline &&&&&& \end{array} $$Step 1 : Bring down the leading coefficient to the bottom row.
$$ \begin{array}{c|rrrrrr}-1&\color{orangered}{ 2 }&0&-2&0&0&-3\\& & & & & & \\ \hline &\color{orangered}{2}&&&&& \end{array} $$Step 2 : Multiply by the number on the left, and carry the result into the next column: $ \color{blue}{ -1 } \cdot \color{blue}{ 2 } = \color{blue}{ -2 } $.
$$ \begin{array}{c|rrrrrr}\color{blue}{-1}&2&0&-2&0&0&-3\\& & \color{blue}{-2} & & & & \\ \hline &\color{blue}{2}&&&&& \end{array} $$Step 3 : Add down last column: $ \color{orangered}{ 0 } + \color{orangered}{ \left( -2 \right) } = \color{orangered}{ -2 } $
$$ \begin{array}{c|rrrrrr}-1&2&\color{orangered}{ 0 }&-2&0&0&-3\\& & \color{orangered}{-2} & & & & \\ \hline &2&\color{orangered}{-2}&&&& \end{array} $$Step 4 : Multiply by the number on the left, and carry the result into the next column: $ \color{blue}{ -1 } \cdot \color{blue}{ \left( -2 \right) } = \color{blue}{ 2 } $.
$$ \begin{array}{c|rrrrrr}\color{blue}{-1}&2&0&-2&0&0&-3\\& & -2& \color{blue}{2} & & & \\ \hline &2&\color{blue}{-2}&&&& \end{array} $$Step 5 : Add down last column: $ \color{orangered}{ -2 } + \color{orangered}{ 2 } = \color{orangered}{ 0 } $
$$ \begin{array}{c|rrrrrr}-1&2&0&\color{orangered}{ -2 }&0&0&-3\\& & -2& \color{orangered}{2} & & & \\ \hline &2&-2&\color{orangered}{0}&&& \end{array} $$Step 6 : Multiply by the number on the left, and carry the result into the next column: $ \color{blue}{ -1 } \cdot \color{blue}{ 0 } = \color{blue}{ 0 } $.
$$ \begin{array}{c|rrrrrr}\color{blue}{-1}&2&0&-2&0&0&-3\\& & -2& 2& \color{blue}{0} & & \\ \hline &2&-2&\color{blue}{0}&&& \end{array} $$Step 7 : Add down last column: $ \color{orangered}{ 0 } + \color{orangered}{ 0 } = \color{orangered}{ 0 } $
$$ \begin{array}{c|rrrrrr}-1&2&0&-2&\color{orangered}{ 0 }&0&-3\\& & -2& 2& \color{orangered}{0} & & \\ \hline &2&-2&0&\color{orangered}{0}&& \end{array} $$Step 8 : Multiply by the number on the left, and carry the result into the next column: $ \color{blue}{ -1 } \cdot \color{blue}{ 0 } = \color{blue}{ 0 } $.
$$ \begin{array}{c|rrrrrr}\color{blue}{-1}&2&0&-2&0&0&-3\\& & -2& 2& 0& \color{blue}{0} & \\ \hline &2&-2&0&\color{blue}{0}&& \end{array} $$Step 9 : Add down last column: $ \color{orangered}{ 0 } + \color{orangered}{ 0 } = \color{orangered}{ 0 } $
$$ \begin{array}{c|rrrrrr}-1&2&0&-2&0&\color{orangered}{ 0 }&-3\\& & -2& 2& 0& \color{orangered}{0} & \\ \hline &2&-2&0&0&\color{orangered}{0}& \end{array} $$Step 10 : Multiply by the number on the left, and carry the result into the next column: $ \color{blue}{ -1 } \cdot \color{blue}{ 0 } = \color{blue}{ 0 } $.
$$ \begin{array}{c|rrrrrr}\color{blue}{-1}&2&0&-2&0&0&-3\\& & -2& 2& 0& 0& \color{blue}{0} \\ \hline &2&-2&0&0&\color{blue}{0}& \end{array} $$Step 11 : Add down last column: $ \color{orangered}{ -3 } + \color{orangered}{ 0 } = \color{orangered}{ -3 } $
$$ \begin{array}{c|rrrrrr}-1&2&0&-2&0&0&\color{orangered}{ -3 }\\& & -2& 2& 0& 0& \color{orangered}{0} \\ \hline &\color{blue}{2}&\color{blue}{-2}&\color{blue}{0}&\color{blue}{0}&\color{blue}{0}&\color{orangered}{-3} \end{array} $$Bottom line represents the quotient $ \color{blue}{ 2x^{4}-2x^{3} } $ with a remainder of $ \color{red}{ -3 } $.