Divide using synthetic division $$ ( -5x^{3}-2x^{2}+x-30 ) \div ( -2 ) $$
Answer
The synthetic division table is:
$$ \begin{array}{c|rrrr}0&-5&-2&1&-30\\& & 0& 0& \color{black}{0} \\ \hline &\color{blue}{-5}&\color{blue}{-2}&\color{blue}{1}&\color{orangered}{-30} \end{array} $$The solution is:
$$ \frac{ -5x^{3}-2x^{2}+x-30 }{ x } = \color{blue}{-5x^{2}-2x+1} \color{red}{~-~} \frac{ \color{red}{ 30 } }{ x } $$Explanation
Step 1 : Write down the coefficients of the dividend into division table.Put the zero at the left.
$$ \begin{array}{c|rrrr}\color{blue}{0}&-5&-2&1&-30\\& & & & \\ \hline &&&& \end{array} $$Step 1 : Bring down the leading coefficient to the bottom row.
$$ \begin{array}{c|rrrr}0&\color{orangered}{ -5 }&-2&1&-30\\& & & & \\ \hline &\color{orangered}{-5}&&& \end{array} $$Step 2 : Multiply by the number on the left, and carry the result into the next column: $ \color{blue}{ 0 } \cdot \color{blue}{ \left( -5 \right) } = \color{blue}{ 0 } $.
$$ \begin{array}{c|rrrr}\color{blue}{0}&-5&-2&1&-30\\& & \color{blue}{0} & & \\ \hline &\color{blue}{-5}&&& \end{array} $$Step 3 : Add down last column: $ \color{orangered}{ -2 } + \color{orangered}{ 0 } = \color{orangered}{ -2 } $
$$ \begin{array}{c|rrrr}0&-5&\color{orangered}{ -2 }&1&-30\\& & \color{orangered}{0} & & \\ \hline &-5&\color{orangered}{-2}&& \end{array} $$Step 4 : Multiply by the number on the left, and carry the result into the next column: $ \color{blue}{ 0 } \cdot \color{blue}{ \left( -2 \right) } = \color{blue}{ 0 } $.
$$ \begin{array}{c|rrrr}\color{blue}{0}&-5&-2&1&-30\\& & 0& \color{blue}{0} & \\ \hline &-5&\color{blue}{-2}&& \end{array} $$Step 5 : Add down last column: $ \color{orangered}{ 1 } + \color{orangered}{ 0 } = \color{orangered}{ 1 } $
$$ \begin{array}{c|rrrr}0&-5&-2&\color{orangered}{ 1 }&-30\\& & 0& \color{orangered}{0} & \\ \hline &-5&-2&\color{orangered}{1}& \end{array} $$Step 6 : Multiply by the number on the left, and carry the result into the next column: $ \color{blue}{ 0 } \cdot \color{blue}{ 1 } = \color{blue}{ 0 } $.
$$ \begin{array}{c|rrrr}\color{blue}{0}&-5&-2&1&-30\\& & 0& 0& \color{blue}{0} \\ \hline &-5&-2&\color{blue}{1}& \end{array} $$Step 7 : Add down last column: $ \color{orangered}{ -30 } + \color{orangered}{ 0 } = \color{orangered}{ -30 } $
$$ \begin{array}{c|rrrr}0&-5&-2&1&\color{orangered}{ -30 }\\& & 0& 0& \color{orangered}{0} \\ \hline &\color{blue}{-5}&\color{blue}{-2}&\color{blue}{1}&\color{orangered}{-30} \end{array} $$Bottom line represents the quotient $ \color{blue}{ -5x^{2}-2x+1 } $ with a remainder of $ \color{red}{ -30 } $.