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17 October, 10:26

Evaluate the following.

let me know if its "Not a real number"

-√81

√-16

+3
Answers (2)
  1. 17 October, 10:34
    0
    Step-by-step explanation:

    (1)

    -√81 = - 9 (although you could argue that it's ± 9, since 81 has two square roots: 9 and - 9). Real number.

    (2) √ (-16) is imaginary, and the value is i·4 (or - i·4). Not a real number.
  2. 17 October, 10:42
    0
    -9, Undefined

    Step-by-step explanation:

    -√81

    -√9^2

    -9
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