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  1. Completing the square (video) | Khan Academy

    You see, completing the square is all about making the quadratic equation into a perfect square, engineering it, adding and subtracting from both sides so it becomes a perfect square.

  2. Squaring numbers (article) | Exponents | Khan Academy

    This is because of PEMDAS. Although not written, the full expression is 0-3² since in PEMDAS you do exponents before subtraction, you get -9. In parenthesis it is (0-3)². the parenthesis allows the …

  3. Algebra 1 | Math | Khan Academy

    The Algebra 1 course, often taught in the 9th grade, covers Linear equations, inequalities, functions, and graphs; Systems of equations and inequalities; Extension of the concept of a function; Exponential …

  4. Completing the square review (article) | Khan Academy

    Completing the square is a technique for factoring quadratics. This article reviews the technique with examples and even lets you practice the technique yourself.

  5. Quadratic functions & equations | Algebra 1 | Math | Khan Academy

    More on completing the square Learn Solve by completing the square: Integer solutions Solve by completing the square: Non-integer solutions Worked example: completing the square (leading …

  6. Solving quadratics by completing the square

    This challenge question gives us a shortcut to completing the square, for those that like shortcuts and don't mind memorizing things. It shows us that in order to complete x 2 + b x into a perfect square, …

  7. The quadratic formula | Algebra (video) | Khan Academy

    Yes. You see, there are times when a quadratic may not be able to be factored (mainly a method called "completing the square"), or factoring it will produce some strange irrational results if we use the …

  8. Completing the square (intro) (practice) | Khan Academy

    What is the missing constant term in the perfect square that starts with x 2 16 x ?

  9. Squares and square roots (practice) | Khan Academy

    What is the square of the number obtained by calculating (121 + A 8 3) ? Choose 1 answer: A 144

  10. Solving quadratics by taking square roots

    The inverse operation of taking the square is taking the square root. However, unlike the other operations, when we take the square root we must remember to take both the positive and the …