Expressions and equations What is algebra? Algebra is part of maths where we use letters to represent unknown values or values that can change.

Equations vs. expressions Understand the difference between a mathematical equation (like a complete sentence) and a mathematical expression (like a phrase in a sentence).

The confusion (likely intentional) boiled down to a discrepancy between the math rules used in grade school and in high school. By Steven Strogatz Recently I wrote about a math equation that had ...

Quadratic equations are polynomials, meaning strings of math terms. An expression like “x + 4” is a polynomial. They can have ...