Hello, Michael!

Matrices satisfy equation: . .and is a 5×5 matrix.

(a) If A has 3 columns, and C has 4 rows, ﬁnd the dimensions of each matrix.

(b) Give conditions on the matrices , if necessary,

to ensure that we can solve the above equation.

Find an expression for the unknown matrix

We have: .

We see that: .

(a)Therefore: .

(b) And