Discuss Forum
1. x + y = 12 এবং x - y = 2 হলে xy-এর মান কত?
- A. 35
- B. 35
- C. 35
- D. 35
Answer: Option A
Explanation:
xy = {(x + y)² - (x - y)²}/4
বা, xy = {(12)² - (2)²}/4
বা, xy = (144 - 4)/4
বা, xy = 140/4
∴ xy = 35
Post your comments here:
1. x + y = 12 এবং x - y = 2 হলে xy-এর মান কত?
Answer: Option A
Explanation:
xy = {(x + y)² - (x - y)²}/4
বা, xy = {(12)² - (2)²}/4
বা, xy = (144 - 4)/4
বা, xy = 140/4
∴ xy = 35
Post your comments here: