Chapter 1.7, Problem 2E

To determine

To explain : If $a$ and $b$ are integers and the expression $ab$ is positive, what do you know about the signs of $a$ and $b$ .

Answer to Problem 2E

The signs of $a$ and $b$ will be same. Either both are positive or negative.

Explanation of Solution

Given information :

$a$ and $b$ are integers and the expression $ab$ is positive.

The product of two integers with the same signs is positive.

Therefore, both $a$ and $b$ are either positive or negative.