What two numbers have a product of - 100 and a sum of 0

10 and - 10

The number 0 is called the additive identity because when you add it to a number, the result you get is the same number. For example, 4 + 0 = 4. Any two numbers whose sum is zero, such as 3 and - 3, because 3 + (-3) = 0.

Step-by-step explanation:

The number 0 is called the additive identity because when you add it to a number, the result you get is the same number. For example, 4 + 0 = 4. Any two numbers whose sum is zero, such as 3 and - 3, because 3 + (-3) = 0.