Question

if x and y are any two 2x2 matrices such that XY=YX=Y and Y is not a zero matrix, what can you say about the matrix X

Answer 1

Answer:

X is an identity matrix of order 2

Step-by-step explanation:

Let Y = a  b    and  X= 1   0

            c  d                  0   1

XY = a  b       and YX = a  b      = Y  

        c  d                        c  d