(x+ x - 20) এর উৎপাদক কোনটি? 

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

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

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