What is equivalent to 13 - √( - 81)

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asked Sep 2, 2019 14.0k views

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Jaco Pretorius · Answer 1 · 2019-09-07T02:12:45+0000

√- 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

What is equivalent to 13 - √( - 81)

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