This task asks students to estimate the square root of 800 without using a calculator. To do it, they must examine perfect squares that are higher and lower than 800. Aligns with 8.NS.A.

Students can type any positive or negative number into the square root calculator. The calculator reduces the square root to its simplest radical form.

A proof to show that the square root of two is an irrational number, followed by a shorter and even more beautiful proof.

What do you do if the denominator contains a radical? This article explains how to rationalize a denominator that contains square roots, higher roots and the sums and differences of square roots. The examples also include problems that...

The purpose of the task is to show students a situation where squaring both sides of an equation can result in an equation with more solutions than the original one, because it is possible to have two unequal numbers whose squares are...

This comprehensive study guide highlights the main terms and formulas needed to review solving quadratic equations. Examples are included.