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1. a+b=6 এবং a-b=2 হলে, ab=কত?

  • A. ৮
  • B. ৮
  • C. ৮
  • D. ৮

Answer: Option A

Explanation:

4ab = (a + b)^2 - (a - b)^2 = (6)^2 - (2)^2 = 36 - 4

= > 4ab = 32

ab = 8

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