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9 and 16. So let one square number be a², then the next number is (a+1)². Now (a+1)² = a² + 2a + 1, then subtract a² = 2a+1. Set this equal to 7:

  • 2a+1=7
  • 2a = 6
  • a = 3

So a² = 3² = 9, and the next number is 4² = 16.

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12y ago

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