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1. 1+6x- 7 x2  এর উৎপাদক-

  • A. (1-x)(1-7x)
  • B. (1-x)(1-7x)
  • C. (1-x)(1-7x)
  • D. (1-x)(1-7x)

Answer: Option B

Explanation:

দেয়া আছে, 1 + 6x - 7x2 = - 7x2 + 6x + 1 = - 7x2 + 7x - x + 1 = 7x(x - 1) - 1(x - 1) = (x - 1)( - 7x - 1) = - (x - 1)(7x + 1) = (1 - x)(7x + 1) বা (1 - x)(1 + 7x)

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