Simplifying Radicals | MathHelp.com - By MathHelp.com
Transcript
| 00:0-1 | To simplify a square root where the number inside the | |
| 00:04 | radical is not a perfect square . Like the squared | |
| 00:08 | of 98 . We start by making a factor tree | |
| 00:13 | for the number inside 98 is two times 49 . | |
| 00:21 | And if you know your perfect squares , you'll recognize | |
| 00:23 | 49 as seven times 7 what we're looking for in | |
| 00:31 | our factor tree are pairs of factors that are the | |
| 00:35 | same . If a factor pairs up , then it | |
| 00:39 | will come out of the radical . If a factor | |
| 00:43 | does not pair up , then it stays inside the | |
| 00:46 | radical . So here , since our 7s pair up | |
| 00:53 | A seven will come out of the radical since the | |
| 00:59 | two does not pair up , it stays inside the | |
| 01:03 | radical . and our answer is seven route to obviously | |
| 01:10 | it helps to be able to recognize your perfect squares | |
| 01:14 | as you make your factor tree . So in the | |
| 01:18 | next example , let's review the perfect squares for the | |
| 01:21 | numbers between one and 15 . |
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