Simplify the expression 3x(x-12x)+ 3x^2-2(x-2)^2 check all that apply

Hello people, i have a math question that i need with, me, i will give the correct one brainiest, and for the other correct people, a and 5 stars.

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

How do i do this activity, is appreciated