Final answer:
To find (-2) for (x) = 5 •3, substitute x with the given value and multiply it by -2 to get the answer.
Step-by-step explanation:
To find (-2) for (x) = 5 •3, we need to substitute x with the given value. So, (-2) for (x = 5 • 3) becomes (-2) for (15).
Now, to find (-2) for (15), we multiply 15 by -2: (-2) * 15 = -30.
Therefore, the answer is -30.