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1. x+y=6 এবং x-y =4 হলে, xy এর মান কত?
- A. 5
- B. 5
- C. 5
- D. 5
Answer: Option A
Explanation:
xy = {(x + y)/2}² - {(x - y)/2}²
= (6/2)² - (4/2)²
= (36/4) - (16/4)
= 9 - 4
= 5
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1. x+y=6 এবং x-y =4 হলে, xy এর মান কত?
Answer: Option A
Explanation:
xy = {(x + y)/2}² - {(x - y)/2}²
= (6/2)² - (4/2)²
= (36/4) - (16/4)
= 9 - 4
= 5
Post your comments here: