The square root of negative one is an imaginary number, signified by the italic lower-case i.
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Four of anything minus one of the same thing always leaves three of them.
It is +1
[ 2 minus square root of 5 ] is the only one.
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.
It has to be a stupid answer anyway