8 − 65 = 8 65 ⋅ ( − 1 ) = 8 65 ⋅ − 1 = 8 65 i
The square root of -65 can be expressed in terms of the imaginary unit i as i 65 . This involves recognizing that -65 can be rewritten as the product of 65 and -1. Using the property that − 1 = i , we arrive at the final expression.
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