What a Function Is, and How to Work With One
What a function is, how to read f(x), find domain and range, compose two functions, find an inverse, and shift a graph, with worked examples and practice.
Algebra
From fractions and order of operations to quadratics, logarithms and rational expressions. Each guide has worked examples, common mistakes and practice with answers.
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Three Ways to Solve a Quadratic Equation
Three methods for solving any quadratic equation, with fully worked examples, how to choose the fastest method, what the discriminant tells you, and the mistakes that cost the most points.