Question:উৎপাদকে বিশ্লেষণ কর: `ab + a - b - 1`
Answer `ab + a - b - 1 = a(b + 1) - 1(b + 1)` `= (b + 1) (a - 1)` (Ans)
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utpadoke bisholeshn karo: `ab + a - b - 1`