Chapter 4.5, Problem 10WE

To determine

The multiplication of two expressions $2k^2-3k-7$ and $-3k$ by using the vertical form.

Answer to Problem 10WE

  $-6k^3+9k^2+21k$

Explanation of Solution

Given information : Two expressions:

  $\underset{\_}{\begin{array}{l}2k^2-3k-7\\ -3k\end{array}}$

By using vertical form multiplication,

Firstly, we will multiply the ( $2k^2-3k-7$ ) with $-3k$

  $\begin{array}{l}\underset{\_}{\begin{array}{l}2k^2-3k-7\\ -3k\end{array}}\\ -6k^3+9k^2+21k\end{array}$