This looks like scalar matrix multiplication. The idea here is to multiply the scalar 3 by each item inside the matrix.
Doing so leads to the answer [3 -12 15 -21]
Side note: I'm assuming the matrix given to you has 1 row and 4 columns.
Answer:
Im confused with the question you asking
Step-by-step explanation:
M=y2-y1/x2-x1
m=12-4/-6--2
m=8/-4
m=-2
