Question

Complete the multiplication: 2EA

Answer 1

In mathematics, a matrix (plural matrices) is a rectangular array of numbers, symbols, or expressions, arranged in rows and columns.

 

Given that

E = [ 1 2]

 

A = | 3  0|

      | 2 -1 |

2EA = 2 [1 2] | 3  0|

                      | 2 -1 |

 

2EA = [ 14  -4]

 

Answer 2

Answer:

$\left[\begin{array}{ccc}14&-4\end{array}\right]$

Step-by-step explanation:

To find out the matrix 2EA we multiply EA first and then multiply it by 2

E=$\left[\begin{array}{ccc}1&2\end{array}\right]$

A=$\left[\begin{array}{ccc}3&0\\2&-1\end{array}\right]$

To get EA , multiply 1 and 2 with 3  and 2= 3+4=7

multiply 1 and 2 with 0 and -1= -2

EA= $\left[\begin{array}{ccc}7&-2\end{array}\right]$

Now we multiply 2 with EA

So matrix becomes

2EA= $\left[\begin{array}{ccc}14&-4\end{array}\right]$