1 . x + y = 6 এবং x - y = 4 হলে xy এর মান কত?
Answer: Option B
Explanation:
xy = {(x + y)/2}² - {(x - y)/2}²
= (6/2)² - (4/2)²
= (36/4) - (16/4)
= 9 - 4
= 5
Data added successfully.