2x2+x-15-এর উৎপাদক কোনটি?

A (x + 3) (2x-5)
B (x-3) (2x-5)
C (x -3)(2x-5)
D (x+3)(2x+5)

Correct Answer: (x + 3) (2x-5)

2x2 + x - 15 = 2x2 + 6x - 5x - 15 = 2x(x + 3)  - 5(x + 3) = (x + 3)(2x - 5)
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