1 HARD What are the factors of $$x^2 - x$$? $$x$$ and $$x - 1$$$$x^2 + x$$ and $$-1$$$$x^2 - 1$$ and $$x$$$$x^2$$ and $$-x$$None of the above

 2 HARD Factor $$x^4y^2z + y^2z^2$$.