Question

How does one determine the sign of the product of
several numbers?

Answer 1

Explanation:

If all the numbers are positive then the sign of the product is positive.

If all the numbers are negative and there is on odd number of numbers the sign is negative, whereas if there is an even number of negatives the sign is positive.

If there is a mixture on negatives and positives, the sign of the product will depend on whether there is an odd or even number of negatives.