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Unformatted text preview: h to check that 3i is correct. ( 3i ) 2 = 9i 2 = -9 However, that is not the only possibility. Consider the following, ( -3i ) 2 = ( -3) i 2 = 9i 2 = -9
2 and so if we square -3i we will also get -9. So, when taking the square root of a negative number
there are really two numbers that we can square to get the number under the radical. However,
we will ALWAYS take the positive number for the value of the square root just as we do with the
square root of positive numbers. © 2007 Paul Dawkins 57 http://tutorial.math.lamar.edu/terms.aspx College Algebra Solving Equations and Inequalities
In this chapter we will look at one of the standard topics in any Algebra class. The ability to
solve equations and/or inequalities is very important and is used time and again both in this class
and in later classes. We will cover a wide variety of solving topics in this chapter that should
cover most of the basic equations/inequalities/techniques that are involved in solving.
Here is a brief listing of the material...
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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