What non-zero integer must be placed in the square so that the simplified product of these two binomials is a binomial: $(3x+2)(12x-\Box )$?
box = 8
36x^2 +24x -24x - 16
36x^2 -16 is the binomial
You have not given an explanation. You have only shown a check.
I suppose if guest asker wants an explanation they will ask for it.