Question

I need help calculating ba

Answer 1

[ 1 0]

[ 0 1]

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]