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1. a3 - 7a - 6 এর উৎপাদক কত?
- A. (a + 1)(a - 2)(a - 3)
- B. (a + 1)(a - 2)(a - 3)
- C. (a + 1)(a - 2)(a - 3)
- D. (a + 1)(a - 2)(a - 3)
Answer: Option C
Explanation:
a3-7a-6
=a3+a2-a2-a-6a-6
=a2(a+1)-a(a+1)-6(a+1)
=(a+1)(a2-a-6)
=(a+1)(a2-3a+2a-6)
=(a+1){a(a-3)+2(a-3)}
=(a+1)(a+2)(a-3)
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