This preview shows page 1. Sign up to view the full content.
Unformatted text preview: 25 x - 4 Notice that, in this case, the answer has no radicals. That will happen on occasion so don’t get
excited about it when it happens.
[Return to Problems] The last part of the previous example really used the fact that ( a + b ) ( a - b ) = a2 - b2 If you don’t recall this formula we will look at it in a little more detail in the next section.
Okay, we are now ready to take a look at some simplification examples illustrating the final two
rules. Note as well that the fourth rule says that we shouldn’t have any radicals in the
denominator. To get rid of them we will use some of the multiplication ideas that we looked at
above and the process of getting rid of the radicals in the denominator is called rationalizing the
denominator. In fact, that is really what this next set of examples is about. They are really more
examples of rationalizing the denominator rather than simplification examples. Example 5 Rationalize the denominator for each of the following.
(b) 5 3 [Soluti...
View Full Document
This note was uploaded on 06/06/2012 for the course ICT 4 taught by Professor Mrvinh during the Spring '12 term at Hanoi University of Technology.
- Spring '12