When determining the equilibrium concentrations for the reaction ; a simplifying assumption can be used under certain conditions to avoid solving a quadratic equation. Classify each situation by whether the simplifying assumption can be used or whether the quadratic formula is required. Use simplifying assumptions - Quadratic formula required 1. [AB] = 0.0178 M; 2. [AB] = 0.00204 M; 3. [AB] =0.451 M; = 0.000905 4. [AB] = 0.0174 M; = 0.0000925 5. [AB] = 0.396 M; = 0.00228