Question

If A is a 2x2 order matrix with 1st
row [23] and 2nd row [1 2] and If B
also is a 2x2 order matrix with 1st
row [1 1 ] and 2nd row [20] then the
matrix BA is with​

Answer 1

Answer:

here is the answer. ...see the picture

Answer 2

Answer:

Matrix BA is a 2x2 matrix with 1st row [3 5] and 2nd row [4 6]

Step-by-step explanation:

Given that:

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

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

To calculate BA,

Multiply the 1st row of B with the 1st column of A

Therefore, BA =  $\left[\begin{array}{ccc}1&1\\2&0\end{array}\right]$ $\left[\begin{array}{ccc}2&3\\1&2\end{array}\right]$  

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

                        =  $\left[\begin{array}{ccc}2+1&3+2\\4+0&6+0\end{array}\right]$

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

Therefore, matrix BA is a 2x2 matrix with 1st row [3 5] and 2nd row [4 6]