Chapter 1 - Foundations for Algebra - 1-6 Multiplying and Dividing Real Numbers - Practice and Problem-Solving Exercises - Page 43: 58

If the number of negative factors is odd, the sign of the product is negative. If the number of negative factors is even, the sign of the product is positive.

$(-2)(-2)=4$ $(-2)(-2)(-2)=-8$ $(-2)(-2)(-2)(-2)=16$ $(-2)(-2)(-2)(-2)(-2)=-32$ $(-2)(-2)(-2)(-2)(-2)(-2)=64$ $(-2)(-2)(-2)(-2)(-2)(-2)(-2)=-128$ $(-2)(-2)(-2)(-2)(-2)(-2)(-2)(-2)=256$