The trick for this problem is knowing that 2 negatives make a positive.
There are 2 negatives in the first expression. We already know it will be positive.
The second expression has 4 negatives. 2 and 2 means it will be positive.
The third expression will produce a negative product.
The fourth expression since multiplied by 0 in the end will equal 0 no matter what.
Hope this helps!
