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A financial analyst uses the rational equation 5x2+2x33x2+x2=1x2+5x+6\frac{5}{x^2+2x-3} - \frac{3}{x^2+x-2} = \frac{1}{x^2+5x+6} to model cost distributions across departments. Solving the fraction-free version of this equation yields the result x=2x = -2. However, because substituting x=2x = -2 back into the original formula causes division by zero, it must be rejected. In algebra, this type of mathematically invalid result that arises from the correct solving procedure is known as an ____ solution.

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Updated 2026-05-25

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