sqrt(x - 1) has no rational polynomials as factors.
Otherwise, there are
sqrt[sqrt(x) - 1)]
and
sqrt[sqrt(x) + 1)]
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The square root of minus 8 is equal to the square root of 8 times the square root of minus 1, or 2.8284i.
it is 3i and imaginary where i = square root of -1
It is +1
The answer is 2i. When dealing with negative square roots, the expression i is used to represent the square root of -1.
Rounded to two decimal places, sqrt(-2272) = 47.67 i. i is an imaginary number equal to the square root of minus one, and thus 47.67 i is equal to 47.67 times the square root of minus 1.