roots

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