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Making Triangles

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Author: Steve Risberg
Description: teacher support active problem Algebra, difficulty level 4. The lengths of three segments are represented by (n + 2)^2, 9, and n(n + 5). Determine for what values of 'n' these three segments can be used to form a triangle.
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Problem page: http://mathforum.org/librarypow/puzzles/index2.ehtml?puzzle=3136
Support page: http://mathforum.org/pow/support/algpow/20040419alg.teacher.html
Solution page: Problem #3136

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