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1. a +b = 6, এবং a-b=4 হলে, ab এর মান কত?
- A. 2
- B. 2
- C. 2
- D. 2
Answer: Option B
Explanation:
(a+b)²=(a-b)²+4ab
or, ab={(a+b)²-(a-b)²}/4
or, ab=(6²-4²)/4=5
(ans)
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1. a +b = 6, এবং a-b=4 হলে, ab এর মান কত?
Answer: Option B
Explanation:
(a+b)²=(a-b)²+4ab
or, ab={(a+b)²-(a-b)²}/4
or, ab=(6²-4²)/4=5
(ans)
Post your comments here: