Posted by michelle on Monday, December 6, 2010 at 11:27pm.
It would be clearer if you had written √ using the sqrt() notation, since the range of the square root would be clear.
I have to guess that the question is:
i squared square root -80
=i² * *radic;(-80)
(=i^2 * sqrt(-80))
=(-1) * sqrt(-2^4 * 5)
=(-1) * 2²sqrt(-5)
=-4sqrt(5)i
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