1.9 Polynomial and Rational Inequalities, 4.5 Quadratic Inequalities, Quadratic Inequalities Quadratic Inequalities June 10, 2017 admin
1.7 Linear Inequalities, 4.1 Linear Functions and Their Properties, Compound Inequalities, Inequalites Compound Inequalities June 9, 2017 admin https://www.khanacademy.org/math/algebra/one-variable-linear-inequalities/compound-inequalities/v/compound-inequalities