No.
√19 is an irrational number.
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No
The square root of 19 is approximately 4.36
19 squared is 361 but the square root of 19 is an irrational number and it is about 4.359 rounded to 3 decimal places
No negative number can have a real square root.In math and engineering, the symbol ' i ' is used to representthe square root of -1 .Then the square root of -19 can be written as 4.3589 i (rounded).
Yes