নিচের কোনটি x³−6x²+11x−6 এর উৎপাদক নয়?
Solution
Correct Answer: Option D
x3 - 6x2 + 11x - 6
= x3 - x2 - 5x2 + 5x + 6x - 6
= x2(x - 1) - 5x(x - 1) + 6(x - 1)
= (x - 1)(x2 - 5x + 6)
= (x - 1)(x2 - 3x - 2x + 6)
= (x - 1) { x ( x - 3 ) -2 ( x - 3 ) }
= (x - 1)(x - 2)(x - 3)
= x3 - x2 - 5x2 + 5x + 6x - 6
= x2(x - 1) - 5x(x - 1) + 6(x - 1)
= (x - 1)(x2 - 5x + 6)
= (x - 1)(x2 - 3x - 2x + 6)
= (x - 1) { x ( x - 3 ) -2 ( x - 3 ) }
= (x - 1)(x - 2)(x - 3)
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