The given,matrix is [1 -4 5 -7] Thus, the correct option is A [3 -12 15 -21].
<h3>What is the fundamental principle of multiplication?</h3>
If an event can occur in m different ways and if following it, a second event can occur in n different ways, then the two events in succession can occur in m × n different ways.
The given, a matrix is
[1 -4 5 -7]
The product will be
3. [1 -4 5 -7]
[3 -12 15 -21]
Thus, the correct option is A [3 -12 15 -21].
Learn more about multiplications;
brainly.com/question/14059007
#SPJ1
