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1. x2 - x - 20 এর উৎপাদকে বিশ্লেষণ কোনটি?
- A. (x -5) (x - 4)
- B. (x -5) (x - 4)
- C. (x -5) (x - 4)
- D. (x -5) (x - 4)
Answer: Option C
Explanation:
x2 - x -20
=x2 -5x + 4x -20
=x(x-5) + 4(x-5)
=(x-5) (x+4)
=x2 -5x + 4x -20
=x(x-5) + 4(x-5)
=(x-5) (x+4)
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