Here are my meaningful notes for Algebra 2

Chapter 1: Linear Equations and Systems

Chapter 2: Functions

Chapter 3: Trig and Statistics

Chapter 4: Quadratic Functions

4.2 Multiplying binomials using the area model
​4.2 Factoring ax^2+bx+c (a is 1)
4.2 Factoring ax^2+bx+c  (a is not 1) and factoring out a monomial (thinking classroom model)

Chapter 5: Quadratics and Complex Numbers

Chapter 6: Polynomials

6.4 Sum and Difference of Cubes
6.4b Factoring by Grouping

Chapter 7: Roots

Chapter 8: Exponential Functions

Chapter 9: Probability

Chapter 10: Sequences

Chapter 11: Rational Expressions and Equations

Chapter 12: Logarithmic Functions