I'm so confused. I keep trying to do this on paper, but I keep coming up with different answers. Can you please walk me through this?

The question is asking me to find the polynomial that goes with the model.

It gives me one large white square, two vertical white rectangles, one vertical black rectangle, one small white cube, and three small black cubes.

I know that the white ones are supposed to be positive, and the black is supposed to be negative, but I need some help on how to find the polynomial.

Hmm. I am not sure. Try looking at Khan Academy's videos. They help me with Algebra!