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1. a+b=9p, ab=18p2

  • A. 4p
  • B. 4p
  • C. 4p
  • D. 4p

Answer: Option C

Explanation:

(a+b)²=(a-b)²+4ab

Or, (9p)²=(a-b)²+4(18p²)

Or, (a-b)²=81p²-72p²=9p²

Or, a-b=3p

(ans)

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