x3 -x- 6 এর উৎপাদকে বিশ্লেষিত রূপ কোনটি ?

A (x+2) (x2 +2x+3)

B (x-2) (x2 +2x+3)

C (x-2) (x2 - 2x+3)

D (x+2) (x2 -2x+3)

Solution

Correct Answer: Option B

x3 - x - 6
= x3 - 2x+ 2x- 4x + 3x - 6 
= x2 (x - 2) + 2x (x - 2) + 3 (x - 2)
= (x - 2) (x2 + 2x + 3)

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