Dividing Radicals | MathHelp.com - By MathHelp.com
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| 00:0-1 | Here's one of the most important rules you need to | |
| 00:02 | remember about simplifying radicals . You should never leave a | |
| 00:08 | radical in the denominator of the problem . So here | |
| 00:12 | our first step is to get rid of the radical | |
| 00:15 | in the denominator By multiplying the square root of two | |
| 00:20 | in the denominator by itself . Yes , because the | |
| 00:26 | square root of two times the square root of two | |
| 00:28 | is the square root of four which equals two . | |
| 00:33 | So the radical is gone . If we multiply the | |
| 00:37 | denominator of this fraction by the square root of two | |
| 00:40 | . However , we must also multiply the numerator by | |
| 00:44 | the square root of two . So we have to | |
| 00:48 | route to over route four which simplifies the two route | |
| 00:56 | to over to . Now we can cancel the two | |
| 01:02 | that's outside the radical with the two in the denominator | |
| 01:07 | . So our answer is the square root of two | |
| 01:13 | . So remember to get rid of a square root | |
| 01:16 | in the denominator of the fraction , multiply top and | |
| 01:20 | bottom of the fraction by that square root |
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