Question

I need help calculating ba

Answer 1

Answer:

[ 1     0]

[ 0     1]

Step-by-step explanation:

to obtain a matrix product of B * A we have to multiply the first element of the first row of B by the first element of the first column of A and to this add the second element of the first row of B by the second element of the first row of A, so we will get the first term of the resulting matrix

For each term of the resulting matrix, follow this form

[(B11*A11)+(B12*A21)          (B11*A12)+(B12*A22)]

[(B21*A11)+(B22*A21)        (B21*A12)+(B22*A22)]

                 

                 

[1/4   1/2]      *      [2  2]

[1/4  -1/2]             [1   -1]    

[ (1/4)(2)+(1/2)(1)        (1/4)(2)+(1/2)(-1) ]  

[ (1/4)(2)+(-1/2)(1)       (1/4)(2)+(-1/2)(-1) ]  

[ 1/2+1/2         1/2-1/2]

[ 1/2-1/2          1/2+1/2]

[ 1     0]

[ 0     1]