जॉइन Examsbookउत्तर : 3. "12"
If x is a whole number, then x²(x² - 1) is always divisible by ?5
प्र: If x is a whole number, then x²(x² - 1) is always divisible by ?
- 14false
- 28false
- 312true
- 4Nonefalse
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उत्तर : 3. "12"
व्याख्या :
Answer: C) 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.