If you didn't know, the absolute value is how far away a number is from 0 (btw, simplified definition).
Here's how you would solve it:
First, plug in the values of n and p into the equation.
-3 * | 6*4 - 3*12 |
Second, subtract the numbers inside the | |
-3 * | 24 - 36 | = -3 * | -12 |
Third, take the absolute value of the number inside the | |, which will end up being 12.
Finally, multiply the final two numbers.
-3 * 12 = -36
Hope this helps!