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1. x+y=7 এবং xy=10 হলে (x-y)2এর মান কত?
- A. ৩
- B. ৩
- C. ৩
- D. ৩
Answer: Option C
Explanation:
Given, x + y = 7, xy = 10
Now, (x - y)^2 = (x + y)^2 - 4.xy
= 7^2 - 4.10
= 49 - 40
= 9
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1. x+y=7 এবং xy=10 হলে (x-y)2এর মান কত?
Answer: Option C
Explanation:
Given, x + y = 7, xy = 10
Now, (x - y)^2 = (x + y)^2 - 4.xy
= 7^2 - 4.10
= 49 - 40
= 9
Post your comments here: