Is the product of two integers positive, negative, or zero? how can you tell?

Theres a triangle, on the top theres a plus sign and on the 2 bottoms theres a negative sign when you gom to find the product you check if theres a positive and a negative you cover those up which youll get a negative which is the one left and if theres 2 negatives you cover those up as well which leaves you with a positive