Algebra

Equations, inequalities, and the core algebra every student needs.

3 articles

Algebra

Algebraic Identities: The Essential Formulas with Examples

The essential algebraic identities — square of a sum and difference, difference of squares, cubes, and sum/difference of cubes — with expansion and factoring examples.

5 min read Algebra

How to Solve Quadratic Equations: Formula, Discriminant, Examples

Solve any quadratic equation using the discriminant and the quadratic formula, with the reduced formula and Vieta’s formulas — plus clear worked examples.

4 min read Algebra

Vieta’s Formulas: Sum and Product of Roots (with Examples)

Vieta’s formulas for a quadratic: the sum S = −b/a and product P = c/a of the roots, finding roots by inspection, and the most common applications.

5 min read