সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
If x + y = a and x - y = b, then 2xy =
If x + y = a and x - y = b, then 2xy =
- ক. (b2 - a2)/2
- খ. (a2 - b2)/2
- গ. (a - b)/2
- ঘ. ab/2
সঠিক উত্তরঃ (a2 - b2)/2
এ সম্পর্কিত আরো প্রশ্ন দেখুন
- If 13 = 13w/(1 - w), then (2w)2 =
- A certain sum of money consists of 30 coins, some of which are 10 paisa coins and the rest are 5 paisa coins. If the total value of the coins is Tk.2, what is the number of 10 paisa coins?
- Babu's income is Tk.1000 more than that of Selim. Their total salary is Tk.x. What is Selim's salary?
- If x + y > 5 and x _ y > 3, then which of the following gives all & only possible values of x?
- If 1/x > 1/y, then which of the following must be true?
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