Factor $2r-16$2r−16.
Factor $12nt-60tr$12nt−60tr.
Factor $4x^2-16xy+12xz$4x2−16xy+12xz.
Factor $-12x+4xy+3xyz+20xz$−12x+4xy+3xyz+20xz.
Factor polynomial expressions in one variable, of degree no higher than four, by selecting and applying strategies