Answer :

Let n = 0


= (0 + 3)(0-1)


= (3)(-1)


= -3 which is also an integer


Let n = -1


= (-1 + 3)(-1-1)


= (2)(-2)


= -4 which is also an integer


Let n = 1


= (1 + 3)(1-1)


= (4)(0)


= 0, which is also an integer


Therefore, for any integer value of n the equation will result an integer.


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