What is the absolute value of -3.92

The absolute value of -3.92 is -3.92 because on a number line it the same length. Hope this helps mate

i'm not sure i quite understand, could you provide more information?

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18