Mathematics Videos - MathHelp.com - 1000+ Online Math Lessons - By MathHelp.com
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| 00:0-1 | The following is a selected video from your teacher.com where | |
| 00:03 | you can browse over 450 complete math lessons with example | |
| 00:07 | videos , interactive practice problems , self tests and more | |
| 00:11 | . Try a complete lesson today at your teacher dot | |
| 00:14 | com To simplify a cube root where the number inside | |
| 00:20 | the radical is not a perfect cube . Again , | |
| 00:24 | we start by making a factor tree for the number | |
| 00:28 | Inside 48 is two times 24 . 24 is two | |
| 00:34 | times 12 , 12 , 2 times six and 6 | |
| 00:39 | is two times 3 . The difference with a cube | |
| 00:44 | root is that instead of looking for pairs of factors | |
| 00:48 | that are the same , we're looking for groups of | |
| 00:51 | three factors that are the same . And here you'll | |
| 00:55 | notice that we have a group of 3/2 . So | |
| 01:00 | a two will come out of the cube root . | |
| 01:05 | The two and three that are left over will stay | |
| 01:09 | inside the cube root , multiplying together to make six | |
| 01:13 | . So we have two times the cube root of | |
| 01:17 | six . as you break down cube roots . It | |
| 01:25 | helps to be able to recognize perfect cubes . So | |
| 01:29 | in our next example , let's go over the perfect | |
| 01:32 | cubes for the numbers between one and 6 . |
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