Is the expression 54 divided -6 undefined? If not, find the quotient.

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  54/(-6) = -9

Step-by-step explanation:

From your knowledge of multiplication tables, you know that ...

  6·9 = 54

From your knowledge of signed arithmetic, you know that ...

  54/(-6) = -(54/6) = -(6·9)/6 = -9

The expression is not undefined. The quotient is -9.

(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