Square Roots and Radicals 2

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Taught by YourMathGal
  • Currently 4.0/5 Stars.
6465 views | 1 rating
Part of video series
Meets NCTM Standards:
Lesson Summary:

In this lesson, we learn how to find square roots of variable expressions. We look at variables with different exponents and learn how to simplify them using the laws of exponents. We also learn that a variable with an even exponent is a perfect square, and when we take the square root of it, we get the same variable with half the exponent. We practice simplifying expressions with perfect squares and variables with even exponents, and we are introduced to the idea of irrational numbers and how to approximate them.

Lesson Description:

Learn to find square roots of variable expressions.

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

Questions answered by this video:
  • How do you square variables with exponents?
  • What is x^2 squared?
  • How do you find the square root of a variable to an exponent?
  • Why is the square root of x^6 equal to |x^3|?
  • Why does the square root of x^16 equal x^8?
  • Why is a variable with an even exponent a perfect square?
  • How do you find the square root of a variable expression?
  • What is the square root of 9m^8n^4y^2?
  • What is an irrational number?
  • When is a square root irrational?
  • Staff Review

    • Currently 4.0/5 Stars.
    This lesson takes the ideas from the previous lesson and adds in variables. Now, you will learn how to find the square roots of variables with exponents. Several examples are shown and all concepts are explained very well. This is a great place to start if you are learning to find the square root of variables and variable expressions.