There isn't one single formula, but rather a set of rules. The basic concept is to multiply the absolute values of the integers and then determine the sign of the product based on the number of negative integers involved: an even number of negatives leads to a positive result, and an odd number of negatives gives a negative result.

Integer multiplication follows specific rules based on the signs of the numbers. Positive × Positive = Positive, Negative × Positive = Negative, Positive × Negative = Negative, and Negative × Negative = Positive. Simply put, if you have an even number of negative signs in a multiplication problem, the result will be positive; an odd number of negative signs results in a negative product.

There are three basic rules of integer multiplication. The rules are: · Multiplying two positive integers always result in a positive integer. · Multiplying two negative integers always result in a negative integer. · Multiplying a positive or negative integer always result in a negative integer.