Can you think of any 2x2 matrices d for which cd = dc for all 2x2 matrices c? give 2 different examples of such matricesd.

For any arbitrary 2x2 matrices and , only one choice of exists to satisfy , which is the identity matrix.

There is no other matrix that would work unless we place some more restrictions on . One such restriction would be to ensure that is not singular, or its determinant is non-zero. Then this matrix has an inverse, and taking we'd get equality.

Step 1: 6x-10=1; step 2: 6x=11