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  1. Khan Academy | Khan Academy

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  2. How to simplify square roots (review) (article) | Khan Academy

    Learn how to rewrite square roots (and expressions containing them) so there's no perfect square within the square root. For example, rewrite √75 as 5⋅√3.

  3. Square roots review (article) | Khan Academy

    If the square root is a whole number, it is called a perfect square! In this example, 16 is a perfect square because its square root is a whole number. Want to learn more about finding square …

  4. Approximating square roots (video) | Khan Academy

    Learn how to find the approximate values of square roots. The examples used in this video are √32, √55, and √123. The technique used is to compare the squares of whole numbers to the …

  5. Square roots (practice) | Radicals | Khan Academy

    Practice finding the square root of a perfect square positive integer.

  6. Simplifying square roots | Algebra (video) | Khan Academy

    Your first step is to think what perfect square divides into 72. People usually look for the greatest one, but it really doesn't matter because you can keep taking factors out.

  7. Square roots of perfect squares (article) | Khan Academy

    Connection to a square Finding the square root of 25 is the same as finding the side length of a square with an area of 25 . A square with an area of 25 has a side length of 5 .

  8. Square roots (practice) | Square Numbers | Khan Academy

    Practice finding the square root of a perfect square positive integer.

  9. Approximating square roots walk through - Khan Academy

    Walk through a series of questions and examples that will help you learn how to approximate square roots.

  10. Simplifying square-root expressions (video) | Khan Academy

    Worked examples of taking expressions with square roots and taking all of the perfect squares out of the square roots. For example, 2√ (7x)⋅3√ (14x²) can be written as 42x√ (2x).