algebra 2

find all the REAL square roots of

a.)0.0064 b.)-0.0081

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  1. a.)

    0.0064 = 64 / 10,000

    √0.0064 = √ 64 / √10,000 = 8 / 100 = 0.08

    b.)

    - 0.0081 = - 81 / 10,000

    √- 0.0081 = √- 81 / √10,000 = √ [ 81 * ( - 1 ) ] / √10,000 =

    √ 81 * √ ( - 1 ) / √100 = 9 * i / √100 = 0.09 i

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  2. My typo:

    - 0.0081 = - 81 / 10,000

    √- 0.0081 = √- 81 / √10,000 = √ [ 81 * ( - 1 ) ] / √10,000 =

    √ 81 * √ ( - 1 ) / 100 = 9 * i / 100 = 0.09

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