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If x is a whole number, then x²(x² - 1) is always divisible by ?

Correct Answer: 12

Explanation:

we can do this by trial and error method.


Putting x = 2,we get 2²(2² - 1) = 12.
checking with other integers, the above equation always gives a value which is a multiple of 12,
So, x²(x² - 1) is always divisible by 12.


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