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Square Root Test #2



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In this section, we learn about Square Roots and higher level roots such as cube roots, fourth roots,…etc. We begin our process by learning about the most basic of all roots, the square root. The square root of a number such as 9, is a number that when multiplied by itself gives us back the number 9. Two such numbers would be 3, and (-3). If we multiply 3 • 3 we get 9, also if we multiply (-3)(-3) we get 9. Therefore the square root of 9 is 3 or (-3). We then move into some basic notation issues that occur when dealing with roots in general. We introduce something known as an irrational number, and discuss the difference between a rational and irrational number. We find that any number whose square root is a rational number is called a perfect square. We wrap up the section by showing what to do when we have higher level roots.
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