Calculate the root - Watch video (Algebra I)

Algebra I: Calculate the root

This is a free lesson from our course in Algebra I


	This lesson covers the basics of the square root, the cube root and the nth root. It also explains how to calculate a given root of a given number and how to calculate the square roots and cube roots of a number using the method of prime factorization. You'll also learn how to find the 4^th and the 5^th root of a given number. And you'll learn how to deal with problems line: "What number is multiplied by itself to get 225?" Hint: The approach to this problem is to break down 225 into prime factors. (More text below video...)

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	(Continued from above) You can also deal with the numbers which are not perfect square (dealing here only with the positive roots) E.g. Find square root of 20. Since 16 = 4 and 25 = 5, then 20 should be between 4 and 5 somewhere. Then is the time to make a guess, for example 4.5. Square that, and see if the result is over or under 20, and improve your guess based on that. Repeat the process until you have the desired accuracy (amount of decimals).

	As many of you know, Winpossible's online courses use a unique teaching method where an instructor explains the concepts in any given area to you in his/her own voice and handwriting, just like you see your teacher explain things to you on a blackboard in your classroom. This particular lesson includes the teacher's instruction, practice questions as well as end-of-lesson quizzes for practice. As we mentioned above, you can enroll in our online course in Algebra I by clicking here. The format of Winpossible's online courses is also very suitable for teachers who are using an interactive whiteboard such as Smartboard on Promethean in their classrooms, because the course lessons can be easily displayed on such interactive whiteboards. Volume pricing is available for schools interested in our online courses. For more information, please contact us at educators@winpossible.com.