# roots

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 Author: kaytea1112 ID: 26047 Filename: roots Updated: 2010-07-09 12:26:15 Tags: gre math roots Folders: Description: charts of roots Show Answers:

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1. Powers of Two
21
22
23...
210
2. cubes
13
23...
103
3. Squares
112
122
252
4. decimal values of square roots
5. 24=
16
6. 25 =
32
7. 26=
64
8. 27=
128
9. 28=
256
10. 29
= 512
11. 210=
1024
12. 112=
121
13. 122=
144
14. 132=
169
15. 142=
196
16. 152=
225
17. 162=
256
18. 172=
289
19. 182
= 324
20. 192
= 361
21. 202
= 400
22. 252
625
23. 23
8
24. 33
= 27
25. 43 = 64
26. 53 =
125
27. 63 =
216
28. 73 =
343
29. 83 =
512
30. 93 =
729
31. 103 =
1,000
32. Approximating Roots –
To approximate the value of a root, find the squares that it lies between andestiā£mate.
33. Simplifying Square Roots –
To simplify any square root, rewrite the root as a product of its factors inside the radical and simplify any pairs that lie within.
34. How to simplify complex routes
To simplify complex square roots, the terms within the radical must be combined!
35. Factoring Complex Square Roots –
Complex square roots can often be simplified by factoring out terms in common to both terms within the radical.
36. Adding and Subtracting Square Roots
– Terms that contain the same radical can be added or subtracted.
37. Multiplying Square Roots –
To multiply square roots, combine the terms under a single radical and multiply.
38. Dividing Square Roots –
To divide square roots, break down the radicals, cancel out like terms, and simplify.
39. Radicals in the Denominator –
• Radicals cannot be left in the denominator of a fraction. •
• To rectify the situation, multiply the top and bottom of the fraction by the square root that appears inthe denominator.
40. Conjugates –
Denominators that contain the sum or difference of a square root and another term cannot be simplified by the technique demonstrated above

• .• To simplify an expression such as7, it must be multiplied by the conjugate of its denominator. 5−3(1)
• Put another way, the conjugate of an expression is formed by changing its sign. T
• Mathematically, the difficulty of conjugating can be reduced by factoring the difference between perfect
• squares:
41. Roots As Exponents – All roots can be expressed as fractioned exponents.
Recall that numbers with fractioned exponents can be expressed as roots. The denominator of the exponent determines the root of the base and the numerator determines what power to raise this root to.
42. The Square Root of a Decimal –
There are two ways to take the square root of a decimal. What Squared Equals the Square Root?• In most instances, the easiest way to take the square root of decimal is to ask yourself “what times what would equal the square root?”

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