SOLUTION: Simplify by removing factors of 1 q^2-81/(q+9)^2
-> SOLUTION: Simplify by removing factors of 1 q^2-81/(q+9)^2
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Algebra: Expressions involving variables, substitution
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Simplify by removing factors of 1
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rewriting the numerator:
factoring the numerator (difference of squares):
removing factors of 1: