Final answer:
The complete information about the matrix transformation is not provided; therefore, we cannot determine the factor by which row 2 must be multiplied. To find a multiplication factor, one typically divides the post-transformation row elements by the original row elements.
Step-by-step explanation:
The question seems to be incomplete and does not provide enough information about the initial matrix or the changed matrix to determine the factor by which row 2 must be multiplied. To properly answer this question, specific details about the matrix's transformation are required. For example, if we knew what the second row of the matrix looked like before and after the transformation, we could calculate the necessary factor to achieve that change.
Generally, to find the multiplication factor, one would divide the transformed row elements by the original row elements, provided that none of the original elements are zero. If the question were asking about basic multiplication rules, we can provide examples related to the multiplication of different kinds of numbers and their resultant signs, which is a fundamental concept in algebra.