Quadratic Formula: Derivation, Discriminant, Examples
How to use the quadratic formula, where it comes from, what the discriminant tells you, how to find the vertex of a parabola, plus practice problems.
Tag: algebra
Read article → Quadratic Formula: Derivation, Discriminant, Examples
Precalculus: What It Covers and What You Need for Calculus
What precalculus covers (functions, polynomials, exponentials, logs, trig, sequences), how hard it is, and a study plan with free guides and calculators.
Exponent Rules: Laws of Exponents with Examples
All the exponent rules: product, quotient, power, zero, negative and fractional exponents, with worked examples, scientific notation and common mistakes.