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the square of a number is 19,what is the number?

heeeeeeeeeeelp meeeeeeeeee in myyyyy mathhhhhhhhh

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Ehaab J. | Finance, Accounting, Stat and Econ MBA, MSc, CFA level II ParticipantFinance, Accounting, Stat and Econ MBA, ...
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4.36 =(19)^0.5 which is the square root of 19 

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4.36 is only an approximation of the sqrt(19).
John R. | Physics and Math Tutor – Kind, Easy-going, PatientPhysics and Math Tutor – Kind, Easy-goin...
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Recall that the square root of a number is a number when squared equals the first number. mathematically if b = sqrt(a) then b^2 = a. So what you are looking for is the square root of 19. It turns out that this is an irrational number (a number continues in its decimal places forever) and usually you write only the first few places. Or simply express it as sqrt(19).