About the author
Chris Terry
Editor, Encore Editorial
Editor at Encore Editorial, Chris Terry sets the editorial standards here and turns dense topics into plain English. He has written widely on education, finance, and consumer markets.
Plain-English explainers that pair with the calculators. More are on the way.
Pull the largest perfect-square factor out of a radical, step by step, with worked examples.
Read more →Learn how to find a derivative step by step. This guide covers the power rule, product rule, and chain rule with worked examples.
Read more →Learn how to solve quadratic equations using the quadratic formula, factoring, and completing the square, with clear worked examples.
Read more →Learn how to find the slope of a line from two points, an equation, or a graph. Includes the slope formula and worked examples.
Read more →Learn how to simplify square roots step by step. Find the largest perfect-square factor, split the radical, and reduce. Includes worked examples.
Read more →Standard deviation measures how spread out numbers are from the average. This guide explains the formula, walks through a step-by-step example, and an
Read more →The GCF is the largest number that divides two numbers evenly. The LCM is the smallest number both divide into. Learn the difference with worked examp
Read more →The Pythagorean theorem says a squared plus b squared equals c squared for any right triangle. This guide walks through the proof, worked examples, an
Read more →PEMDAS stands for Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. Learn how to apply the order of operations with step-by-ste
Read more →What b squared minus 4ac tells you about a quadratic before you solve it.
Read more →Turn a pair of points into slope, intercept, and the full equation of the line.
Read more →Editor at Encore Editorial, Chris Terry sets the editorial standards here and turns dense topics into plain English. He has written widely on education, finance, and consumer markets.