What is the remainder when x ^ 3 - 1 divided by (x + 2)

Consider the reaction 2x2y2+z2⇌2x2y2z which has a rate law of rate= k[x2y2][z2] select a possible mechanism for the reaction.

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

X+ y = 5 ; x - y =3 solve using linear combination