I’ve been stuck can someone help

asked Feb 10, 2021 93.3k views

3 votes

by Davvv

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3 votes

Answer:

(a).
A_(x) =
$\left[\begin{array}{cc}12&-4\\66&6\end{array}\right]$

Explanation:

$\left \{ {{5x-4y=12} \atop {3x+6y=66}} \right.$

A =
$\left[\begin{array}{cc}5&-4\\3&6\end{array}\right]$

A_(x) =
$\left[\begin{array}{cc}12&-4\\66&6\end{array}\right]$

A_(y) =
$\left[\begin{array}{cc}5&12\\3&66\end{array}\right]$

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