Openstax Elementary Algebra 2E — Lessons, Skills & Practice | Pengi

OpenStax Elementary Algebra 2E, published by OpenStax (Rice University), is a comprehensive algebra textbook designed for high school and early college-level math students. It covers foundational arithmetic concepts, solving linear equations and inequalities, graphing, systems of equations, polynomials, factoring, rational expressions, roots and radicals, and quadratic equations. The textbook is widely used as an accessible, open-source resource to build core algebraic reasoning and problem-solving skills.

Openstax Elementary Algebra 2E covers 10 chapters and 71 lessons on Pengi.

Openstax Elementary Algebra 2E textbook table of contents

Chapter 1: Foundations

Chapter 2: Solving Linear Equations and Inequalities

  • Lesson 2.1: Solve Equations Using the Subtraction and Addition Properties of EqualityLearnPractice
  • Lesson 2.2: Solve Equations using the Division and Multiplication Properties of EqualityLearnPractice
  • Lesson 2.3: Solve Equations with Variables and Constants on Both SidesLearnPractice
  • Lesson 2.4: Use a General Strategy to Solve Linear EquationsLearnPractice
  • Lesson 2.5: Solve Equations with Fractions or DecimalsLearnPractice
  • Lesson 2.6: Solve a Formula for a Specific VariableLearnPractice
  • Lesson 2.7: Solve Linear InequalitiesLearnPractice

Chapter 3: Math Models

Chapter 4: Graphs

Chapter 5: Systems of Linear Equations

  • Lesson 1: Solve Systems of Equations by GraphingLearnPractice
  • Lesson 2: Solving Systems of Equations by SubstitutionLearnPractice
  • Lesson 3: Solve Systems of Equations by EliminationLearnPractice
  • Lesson 4: Solve Applications with Systems of EquationsLearnPractice
  • Lesson 5: Solve Mixture Applications with Systems of EquationsLearnPractice
  • Lesson 6: Graphing Systems of Linear InequalitiesLearnPractice

Chapter 6: Polynomials

Chapter 7: Factoring

Chapter 8: Rational Expressions and Equations

  • Lesson 8.1: Simplify Rational ExpressionsLearnPractice
  • Lesson 8.2: Multiply and Divide Rational ExpressionsLearnPractice
  • Lesson 8.3: Add and Subtract Rational Expressions with a Common DenominatorLearnPractice
  • Lesson 8.4: Add and Subtract Rational Expressions with Unlike DenominatorsLearnPractice
  • Lesson 8.5: Simplify Complex Rational ExpressionsLearnPractice
  • Lesson 8.6: Solve Rational EquationsLearnPractice
  • Lesson 8.7: Solve Proportion and Similar Figure ApplicationsLearnPractice
  • Lesson 8.8: Solve Uniform Motion and Work ApplicationsLearnPractice
  • Lesson 8.9: Use Direct and Inverse VariationLearnPractice

Chapter 9: Roots and Radicals

Chapter 10: Quadratic Equations

  • Lesson 10.1: Solve Quadratic Equations Using the Square Root PropertyLearnPractice
  • Lesson 10.2: Solve Quadratic Equations by Completing the SquareLearnPractice
  • Lesson 10.3: Solve Quadratic Equations Using the Quadratic FormulaLearnPractice
  • Lesson 10.4: Solve Applications Modeled by Quadratic EquationsLearnPractice
  • Lesson 10.5: Graphing Quadratic Equations in Two VariablesLearnPractice

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