A:
- Equations solvable by factoring polynomials to products of linear and quadratic factors
B:
- Equations solvable by substitution method
- Cubic equations with one of the roots known
- Inequalities solvable by factoring polynomials to products of linear and quadratic factors
C:
- Equations of 4th degree with two of the roots known
- Equations of higher degrees, guessing of some of the roots is necessary
