Square Roots and Radicals 11

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Taught by YourMathGal
  • Currently 4.0/5 Stars.
5959 views | 2 ratings
Part of video series
Meets NCTM Standards:
Lesson Summary:

In this lesson on Square Roots and Radicals, the focus is on adding and subtracting with square roots. The teacher explains that when dealing with square roots, you work with them as if they're a variable. By simplifying the square roots first, you can then add or subtract them just like like terms in algebra. However, if the square roots have different values, they cannot be combined. The lesson also includes examples and practice problems for the viewer to try.

Lesson Description:

Square Roots and Radicals Part 11 covers adding and subtracting with square roots.

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

Questions answered by this video:
  • How do you add and subtract square roots?
  • How do you know when can you add or subtract radicals?
  • What does 3sqrt(2) + 5sqrt(2) equal?
  • Why can you not add 2sqrt(3) + 5sqrt(2)?
  • How can you add and simplify square root 8 + square root 18?
  • How can you add and simplify 2*sqrt(27) + 3*sqrt(50)?
  • How can you subtract and simplify 5x*sqrt(45x^3) - 3*sqrt(20x^5)?
  • How do you subtract and simplify 3m*sqrt(18x^2) - x*sqrt(27m^2)?
  • How do you know when you can combine variables and square roots?
  • How do you simplify and combine like terms in 4x*sqrt(32) - sqrt(18x^2) + 2x*sqrt(128)?
  • Staff Review

    • Currently 4.0/5 Stars.
    This lesson explains the concept of adding and subtracting square roots with common expressions under the radical sign. This is a very common concept in Algebra, and this is a very good tutorial to watch in order to learn this idea. Some very complicated example problems are simplified and explained step by step.