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Unformatted text preview: z xy 18. ( 29 ( 29 2 3 2 2 b ab3 Simplifying Radicals A number y is called the square root of a number x if x y = 2 . (4) 2 = 4 2 = 16. So, 4 and 4 are both square roots of 16. In general, if x >0, then x has two square roots. However, we use the symbol x for the “principal square root”, which is the positive square root of x . Example: 4 16 = = 25 = 49 Examples: Simplify the following. 1. 64 2. 100 3. 12 4. 50 5. 2 5 6. 3 2 36Notation: x x = 2 / 1 7. 2 / 1 49 8. 121 100 81 2 / 1 2 / 1+...
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 Spring '08
 Staff
 Radicals, Exponents, Power Rule, Nth root

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