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[(x+3)^2] - [(x+2)^2] = 13

==> 2x = 8

==> x = 4.

the number is 4!

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โˆ™ 2012-01-17 16:04:30
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Q: When the sum of a number plus 3 is squared it it 13 more than the sum of the number plus 2 when squared?
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