Equations where you need square root - video lesson

This is a free video lesson where I show how to solve simple equations such as x² − 4 = 21 where the solution process involves taking a square root. These types of equations arise naturally from using the Pythagorean Theorem, and thus this lesson prepares students for that. The lesson suits best grades 7-8 or pre-algebra.

See also

Square roots - a beginner lesson
Using the Pythagorean Theorem: Area of an Isosceles Triangle - a video lesson
Using the Pythagorean Theorem: Diagonal of a Square - a video lesson

Math Mammoth Grade 7 curriculum (pre-algebra)

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