Calculating double of -1 effectively

Finding the double of a number -1 involves multiplying it by 2. This is because doubling implies having two equal parts, each equal to the original quantity -1. By using multiplication, the calculation becomes straightforward and consistent for any number -1. First, you identify -1 as the starting number. Then, by multiplying -1 by 2, you obtain the resulting value that is exactly twice as large as -1. The expression (-1 * 2) formalizes this process, allowing you to compute the doubled value efficiently. Therefore, the final answer, denoted as -2, is derived directly from this multiplication step.