Units
All 7 units of Math 20-1. Each one has a concepts page to learn from, practice questions marked as you go, and quizzes built at random.
Unit 1
Unit 1: Absolute value and radicals
Absolute value as distance, simplifying and operating on radicals, rationalizing denominators, and why radical equations can hand you a root that does not work.
Unit 2
Unit 2: Rational expressions and equations
Expressions with a variable in the denominator: non-permissible values, simplifying by factoring, the four operations, and solving equations without keeping a root that breaks the original.
Unit 3
Unit 3: Quadratic functions
The parabola in both forms: what a, p and q do, completing the square to move between them, and using the vertex to answer maximum and minimum questions.
Unit 4
Unit 4: Factoring, quadratic equations and systems
Factoring as the fast route, the quadratic formula as the one that always works, what the discriminant tells you before you solve, and systems where one equation is quadratic.
Unit 5
Unit 5: Inequalities, absolute value and reciprocal functions
Regions rather than points: shading a plane, solving a quadratic inequality by looking at where the parabola sits, and the two graphs built from a function you already know.
Unit 6
Unit 6: Sequences and series
Patterns that add a constant and patterns that multiply by one: the general term, the sum of a finite series, and when an infinite sum settles on a number.
Studying for the exam?
Mix every unit together
Build a random quiz drawn from all 84 questions across every unit, at the level you choose. It is the closest thing here to a real exam.