1 . a2 - b2 + 4bc - 4c2 এর উৎপাদক কোনটি?
- A. (a + b + c) (a - b + c)
- B. (a - b + 2c) (a + b + c)
- C. (a + b - 2c) (a - b + 2c)
- D. (a2 + b2 - 2c) (a - b + 2c)
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