Final answer:
To write X as a product of elementary matrices, perform the elementary row operations needed to transform the matrix X into row echelon form and record the resulting matrices at each step.
Step-by-step explanation:
To write X as a product of elementary matrices, we need to express X as a sequence of elementary row operations. Each elementary row operation can be represented by an elementary matrix.
Let E1, E2, and E3 represent the elementary matrices corresponding to the elementary row operations needed to transform the matrix X into its row echelon form. Then, X can be expressed as a product of E1, E2, and E3: X = E1 * E2 * E3.
To find the values of E1, E2, and E3, you would need to perform the elementary row operations on the matrix X and record the resulting matrices at each step.