![A= \left[\begin{array}{cc}1&3\\5&2\end{array}\right] \\ \\3A=\left[\begin{array}{cc}3&9\\15&6\end{array}\right] \\ \\B= \left[\begin{array}{cc}4&9\\0&3\end{array}\right] \\ \\2B= \left[\begin{array}{cc}8&18\\0&6\end{array}\right] \\ \\3A-2B=\left[\begin{array}{cc}3&9\\15&6\end{array}\right]- \left[\begin{array}{cc}8&18\\0&6\end{array}\right]=\left[\begin{array}{cc}3-8&9-18\\15-0&6-6\end{array}\right]= \\ \\=\left[\begin{array}{cc}-5&-9\\15&0\end{array}\right]](/tpl/images/0473/8015/fbd9a.png)
Given the following matrices, find 3a - 2b. (hint: find 3a and 2b first and then subtract.)
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Mathematics, 27.01.2020 22:31 krandall232
Given the following matrices, find 3a - 2b. (hint: find 3a and 2b first and then subtract.)
a = 1 3
5 2
b = 4 9
0 3
c = 5 -2 1
0 -8 6
-4 4 -4
d = -1 2 1
6 -6 4
2 -8 3
a. -5 -9
15 0
b. 3 9
15 6
c. 11 27
15 12
d. not possible
Answers: 3
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