1 . x4 + 4x2 - 5 এর উৎপাদক কোনটি?
- A. (x - 1) (x2 + 5)
- B. (x + 1) (x - 1) (x2 - 5)
- C. (x + 1) (x - 1) (x2 + 5)
- D. (x + 1) (x2 + 5)
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