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1. a + b = 6, 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
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1. a + b = 6, 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
Post your comments here: