Question

Will give brainlist! need the answer thanks!!!

Answer 1

Answer:

$2A+3B=\begin{bmatrix}-12&21\\14&-19\end{bmatrix}$

Step-by-step explanation:

$A=\begin{bmatrix}3&6\\1&4\end{bmatrix} B=\begin{bmatrix}-6&3\\4&-9\end{bmatrix}$

$2A=2\begin{bmatrix}3&6\\1&4\end{bmatrix} 3B=3\begin{bmatrix}-6&3\\4&-9\end{bmatrix}$

$2A=\begin{bmatrix}6&12\\2&8\end{bmatrix} 3B=\begin{bmatrix}-18&9\\12&-27\end{bmatrix}$

$2A+3B=\begin{bmatrix} 6&12\\2&8\end{bmatrix}+\begin{bmatrix}-18&9\\12&-27\end{bmatrix}$

$2A+3B=\begin{bmatrix} 6+(-18)&12+9\\2+12&8+(-27)\end{bmatrix}$

$2A+3B=\begin{bmatrix}6-18&12+9\\2+12&8-27\end{bmatrix}$

$\huge\purple{2A+3B=\begin{bmatrix}-12&21\\14&-19\end{bmatrix}}$