Now I'm stuck, I can't find any factors that has the product of 48 and the sum of -7.
Textbook Answer: 1
Let a = 3, m = 4, and n = 2. I'm going to calculate .
Our rule states that so
Look at both ways of doing the problem and see if it helps you understand where this rule comes from. It's all about counting out the number of factors of "a" that you have.