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If a² - b² = 56, a + b = 7 then value of a - b is ____?
  1. 5
  2. 8
  3. 49
  4. None of these
Explanation
  • The given equation a² - b² = 56 can be rewritten as (a - b)(a + b) = 56.

  • Since a + b = 7, substituting it gives (a - b) × 7 = 56, solving for a - b gives 8.

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