Topics

Equations and Inequalities

The topic is divided into the following subtopics:
  • Linear Equations and Inequalities
  • Quadratic Equations and Inequalities
  • Higher Degree Equations and Inequalities 
  • Rational Equations and Inequalities
  • Absolute Value Equations and Inequalities
  • Radical Equations and Inequalities
  • Equations and Inequalities with Parameters
  • Systems of Linear Equations and Inequalities
  • Systems of Nonlinear Equations and Inequalities

Linear Equations and Inequalities

Part I:
  • Simple linear equations
  • Equivalent equations
  • Graphical solutions of linear equations
  • Linear equations specified by word description
Part II:
  • Simple linear inequalities
  • Graphical solutions of linear inequalities
  • Linear inequalities specified by word description
Part III:
  • Word problems leading to linear equations and inequalities

Quadratic Equations and Inequalities

Part I:
  • Quadratic equations
Part II:
  • Quadratic inequalities
  • Vieta’s formulas
  • Word problems leading to quadratic equations and inequalities
Part III:
  • Quadratic equations and inequalities with absolute value
  • Word problems – more complex

Higher Degree Equations and Inequalities

Part I:
  • Equations solvable by factoring polynomials to products of linear and quadratic factors
Part II:
  • 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
Part III:
  • Equations of 4th degree with two of the roots known
  • Equations of higher degrees, guessing of some of the roots is necessary

Rational Equations and Inequalities

Part I:
  • Rational equations
  • Domains of rational equations
Part II:
  • Rational inequalities
  • Domains of rational inequalities
Part III:
  • Rational equations and inequalities with absolute values 

Absolute Value Equations and Inequalities

Part I:
  • Linear equations and inequalities with single absolute value - solutions based on geometric interpretation of the absolute value
Part II:
  • Linear equations with one or more absolute values
Part III:
  • Linear inequalities with one or more absolute values
  • Linear equations and inequalities with absolute values inserted in absolute values

Radical Equations and Inequalities

Part I:
  • Equations with an unknown under a single radical
  • Domain of an equation
  • Domain of an expression with an unknown under a radical 
Part II:
  • Equations with unknown under several radicals
  • Inequalities with unknowns under radicals
Part III:
  • Word problems
  • More complex equations – combinations of radicals and absolute values

Equations and Inequalities with Parameters

Part I:
  • Linear equations with a parameter
  • Equations and inequalities with a parameter solved for a given value of the parameter
Part II:
  • Linear inequalities with a parameter
  • Quadratic equations and inequalities with a parameter
Part III:
  • Rational equations and inequalities with a parameter

Systems of Linear Equations and Inequalities

Part I:
  • Systems of two equations with two unknowns
  • One equation with two unknowns
Part II:
  • Systems of three equations with three unknowns
  • Using matrices to solve systems of equations 
  • Solvability of systems of equations 
  • Cramer's rule 
  • Word problems 
  • Systems of equations with parameters
Part III:
  • Systems of inequalities
  • One inequality with two unknowns
  • Two inequalities with one unknown

Systems of Nonlinear Equations and Inequalities

Part I:
  • Systems with linear and quadratic equations
  • One nonlinear equation with two unknowns
  • Systems with an unknown in the denominator
Part II:
  • Systems of polynomial equations
  • Graphical solutions of systems of polynomial equations
Part III:
  • Systems with the unknown in absolute value
  • Systems with the unknown under the square root
  • Systems with parameter
  • Systems of inequalities