Find -5B. Please help

asked Jul 8, 2023 6.6k views

1 vote

Find -5B.
Please help

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11 votes

Answer:

$-5B = \begin{bmatrix}-15&10\\ 20&40\end{bmatrix}$

Explanation:

$B=\begin{bmatrix}3&-2\\ -4&-8\end{bmatrix}$

$\Longrightarrow -5B = -5 *\begin{bmatrix}3&-2\\ -4&-8\end{bmatrix}$

$\Longrightarrow -5B = \begin{bmatrix}-5 *3&-5 *-2\\ -5 *-4&-5 *-8\end{bmatrix}$

$\Longrightarrow -5B = \begin{bmatrix}-15&10\\ 20&40\end{bmatrix}$

Jorgemf answered Jul 12, 2023

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