Question:উৎপাদকে বিশ্লেষণ কর: `(x + 5) (x - 9) - 15` 

Answer `(x + 5) (x - 9) - 15` `= x^2 + 5x - 9x - 45 - 15` `= x^2 - 4x - 60` `= x^2 - 10x + 6x - 60` `= x(x - 10) + 6(x - 10)` `= (x + 6) (x - 10)` (Ans) 

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utpadoke bisholeshn karo: `(x + 5) (x - 9) - 15`
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