9x- 9x - 4 কে উৎপাদকে বিশ্লেষণ করলে হয়-

A (3x - 1)(3x + 4)

B (3x + 1)(3x - 4)

C (3x + 1)(3x + 4)

D কোনটিই নয়

Solution

Correct Answer: Option B

9x- 9x - 4
= 9x2 - 12x + 3x - 4
= 3x(3x - 4) + 1(3x - 4)
= (3x - 4) (3x + 1)

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