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umka21 [38]
3 years ago
7

(2x^3+16x^2-12x+9) ÷ (x+7)

Mathematics
2 answers:
madam [21]3 years ago
3 0
Always eliminate the first one before moving on. Remember to drop down monomials, like you would a normal division problem.

                     2x² + 10x + 18
         __________________
x + 3 | 2x³ + 16x² - 12x + 9
         -(2x³ + 6x²)
         -------------------------------
                    10x² - 12x
                  -(10x² - 30x)
         -----------------------------
                            + 18x + 9
                          - (18x + 54)
                    ----------------------
                                      -45


  2x² + 10x + 18        R: -45/x + 3 is your answer R: = remainder


hope this helps
kogti [31]3 years ago
3 0
\bf 2x^3+16x^2-12x+9~~\div~~ x+7\\\\
-------------------------------\\\\
x+7=0\implies x=\stackrel{our~divisor}{-7}
\\\\\\
\begin{array}{r|rrrrrr}
-7&&2&16&-12&9\\
&&&-14&-14&182\\
--&&--&--&--&--\\
&&2&2&-26&\boxed{191}&\leftarrow remainder
\end{array}
\\\\\\
\stackrel{quotient}{2x^2+2x-26}\qquad \qquad \qquad \qquad \stackrel{\textit{we can also write it like}}{2x^2+2x-26+\frac{191}{x+7}}
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