x2 + x - 20 এর উৎপাদকে বিশ্লেষণ কত হবে?

A (x - 5)(x - 4)

B (x + 5)(x - 4)

C (x - 5)(x + 4)

D (x + 5)(x + 4)

Solution

Correct Answer: Option B

x2 + x - 20
= x2 + 5x - 4x - 20
= x(x + 5) - 4(x + 5)
= (x + 5)(x - 4)

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