সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
In the expression of (x - y)3, the coefficient of y2 is:
In the expression of (x - y)3, the coefficient of y2 is:
- ক. 1
- খ. 3
- গ. 3a
- ঘ. -3a2
সঠিক উত্তরঃ 3
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