Short Answer

Final Validation in Rational Equation Modeling

An HVAC technician is using the rational equation 15y=6y21 - \frac{5}{y} = -\frac{6}{y^2} to calculate the pressure yy within a ventilation system. After performing the algebraic work, the technician finds the potential solutions y=2y = 2 and y=3y = 3. According to the standard five-step strategy for solving rational equations, identify the name of the final step that must be performed to verify these results. Additionally, provide the specific mathematical term for a solution that must be rejected because it makes the original equation undefined.

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Updated 2026-04-18

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