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1. a+b= 17 এবং ab=60 হলে, (a-b)2 এর মান কত?

  • A. 49
  • B. 49
  • C. 49
  • D. 49

Answer: Option A

Explanation:

a-b2=a+b2-4ab=172-4×60=289-240=49

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