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15-05-2018
Mathematics

contestada

what is equivalent to
[tex]13 - \sqrt{ - 81} [/tex]

Respuesta :

27-05-2018

√- 81 doesn't result in a rational number because you can't get a negative from squaring any number. Instead you get a number with an imaginary number.

13 - √- 81 = 13 - 9i

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