Alex has $4,500 in his college savings account. When he starts college, he withdraws $750 from his account every month. Based on this information, which equation best represents the relationship between the number of months, x, and the amount of money left in his savings account, y?

(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

how am i supposed to answer

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