-3x(2xy +3y -2x) = (-3x)(2xy) + (-3x)(3y) + (-3x)(-2x)

= (-6x

= -6x

I believe students get in trouble with double negatives. They are conceptually mind-bending.

My advice is to do it the way I did it above. Keep the signs between the terms positive until the very end, and carry the sign with the number. Use parentheses as needed to keep the term sign separate from the sign of the number (as I have done).

= (-6x

^{2}y) + (-9xy) + (6x^{2})= -6x

^{2}y - 9xy + 6x^{2}xI believe students get in trouble with double negatives. They are conceptually mind-bending.

My advice is to do it the way I did it above. Keep the signs between the terms positive until the very end, and carry the sign with the number. Use parentheses as needed to keep the term sign separate from the sign of the number (as I have done).

^{}