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11 February, 03:39

5·cubed squreroot - 27+18

+1
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  1. 11 February, 04:33
    0
    so factor - 27

    -27=-1 times 3 times 3 times 3

    ∛ (-1 times 3 times 3 times 3) = 3 times ∛-1

    remember that ∛-1=-1

    2 times ∛-1=3 times - 1=-3

    now we have

    5 times (-3) + 18

    5 times - 3=-15

    -15+18=3

    answer is 3
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