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6c²-3c+12bc= 3c(2c-1+4b)
2y(x-3y)+5(3y-x)=2y(x - 3y) + 5(-(x- 3y))=
=2y(x - 3y) - 5(x- 3y)=(x-3y)(2y-5)
_____________________________________
6c²-3c+12bc= 3c(2c-1+4b)
2y(x-3y)+5(3y-x)=2y(x - 3y) + 5(-(x- 3y))=
=2y(x - 3y) - 5(x- 3y)=(x-3y)(2y-5)