Learn Algebra 2
Functions, quadratics, complex numbers, polynomials, radicals and logs. You solve every problem yourself, and the board checks each line as you write it.
240 lessons231 challenges555 quiz questions
- Beginner friendly
Hands-on interactive lessons
Audio narration on every lesson
Quizzes to test your knowledge
Free certificate of completion
Syllabus
Section 1
Functions & Transformations
Start sectionStartFunctions as the language of Algebra 2: evaluating with numbers and expressions, domain and range, adding and composing functions, inverses, shifting, stretching and flipping graphs, average rate of change, and functions built from real situations.Rules That Draw
4 lessons4Expressions as Inputs
3 lessons3Domain and Range
5 lessons315Combining Functions
5 lessons55Composition
6 lessons55Inverse Functions
6 lessons515Shifting Graphs
6 lessons620Stretching and Flipping
5 lessons515Rate of Change
5 lessons55Functions in Stories
5 lessons510Final Challenges
5 lessons520Section 2
Quadratics & Complex Numbers
Start sectionStartQuadratics in depth: the vertex and axis of symmetry, completing the square, vertex form, then the imaginary unit i, arithmetic with complex numbers, complex solutions of quadratics, the discriminant, systems of a line and a parabola, and quadratic models.The Vertex
4 lessons4Completing the Square
4 lessons4Vertex Form by Algebra
5 lessons520Imaginary Numbers
5 lessons415Complex Arithmetic
6 lessons620Complex Solutions
5 lessons5The Discriminant
4 lessons310Lines Meet Parabolas
5 lessons510Quadratic Models
5 lessons55Final Challenges
5 lessons520Section 3
Polynomials & Rational Expressions
Start sectionStartPolynomials and rational expressions cover factoring (grouping, cubes), long division, and Remainder & Factor Theorems. Key skills: solving equations, sign charts, operations, simplifying, handling extraneous solutions, and direct/inverse variation.Polynomial Long Division
4 lessons4Remainders and Factors
4 lessons4Factoring Higher Degree
6 lessons615Polynomial Equations
4 lessons415Sign Charts
5 lessons45Rational Expressions
5 lessons415Adding and Subtracting
5 lessons515Rational Equations
6 lessons610Rational Inequalities
3 lessons35Variation
4 lessons415Final Challenges
5 lessons520Section 4
Radicals & Rational Exponents
Start sectionStartRoots in simplest form: simplifying square and cube roots, adding, subtracting and multiplying radicals, rationalizing denominators, rational exponents, radical equations and their false answers, equations with powers and fractional powers, and radical functions.Simplest Form
4 lessons4Letters and Cube Roots
3 lessons3Multiplying Radicals
5 lessons520Rationalizing
4 lessons415Rational Exponents
5 lessons520Radical Equations
5 lessons515Powers and Roots Equations
5 lessons520Radical Functions
4 lessons415Final Challenges
5 lessons515Section 5
Exponentials, Logs & Sequences
Start sectionStartExponential functions and their graphs, growth and decay, equations with the same base, logarithms and their rules, solving exponential and log equations (with e and ln), then arithmetic and geometric sequences and their sums.Exponential Functions
4 lessons4Growth and Decay
3 lessons3Same-Base Equations
5 lessons515Meet the Logarithm
5 lessons420Log Rules
5 lessons520Solving with Logs
5 lessons515Log Equations
5 lessons5Arithmetic Sequences
4 lessons45Geometric Sequences
5 lessons510Final Challenges
5 lessons525
Learn by Solving
Work every problem yourself on an interactive board. Each step is a move you choose, every line is checked, and graphs are drawn by hand.
Solving is a game of legal moves. You pick the move; every line follows from the one before it.
Build Your Math Streak
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12 days streak
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January 2026
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Double or Nothing
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You're Not Alone
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Promotion zoneEvery way to learn
Read, listen, test yourself, ask the AI about your own steps, or look up anything you've already covered. Every lesson meets you where you are.
An equation is a claim: the two sides name the same number. The equals sign asserts sameness, it gives no orders.
A solution is a value of the unknown that makes the claim true. Substitute it and both sides agree.
Solving means changing the form without changing the claim: the same move applied to both sides keeps the balance.
Earn a Certificate
Earn a certificate when you complete a section. Add it to your LinkedIn profile to show how far your math has come.
Certificate of Completion
Math Fundamentals
Add to LinkedInWhy learn Algebra 2 with Coddy
- You do the algebra. Complete the square, divide polynomials, rationalize a denominator: the board accepts only a line that follows from the one above.
- False answers are caught. Radical, rational and log equations can give answers that do not work, and the board checks each one.
- Graphs drawn by hand. Shift, stretch and flip a parabola on the grid, and the check reads exactly what you drew.
- Free certificate of completion you can share on LinkedIn or your resume. It's proof you finished an interactive Algebra 2 course, not just watched videos.
Frequently asked questions about Algebra 2
What do you learn in Algebra 2?
Functions and their graphs, completing the square and vertex form, complex numbers, polynomial division and factoring, rational expressions and equations, radicals and rational exponents, exponentials and logarithms, and sequences.
Is Algebra 2 harder than Algebra 1?
Problems take more steps and bring in new numbers and functions, but every topic builds on Algebra 1.
What should I know before starting Algebra 2?
Linear equations, graphing lines, exponents, factoring and the quadratic formula. Coddy's Algebra course covers all of them.
Do I need Geometry before Algebra 2?
No. Many schools teach Geometry in between, but this course does not use it.
Is the Algebra 2 course free?
Yes, every lesson and problem is free. Pro removes the daily limit and adds unlimited help from the AI tutor.
Do I get a Algebra 2 certificate when I finish?
Yes. When you complete the Algebra 2 course you receive a free certificate of completion that you can share on LinkedIn or add to your resume.
