Respuesta :

A. [tex] \sqrt{1}[/tex] equals 1 and that is a rational number 

B. [tex] \sqrt{1} \sqrt{9} [/tex] equals 1*3 = 3 and is a rational number

C.[tex] \sqrt{25} [/tex] equals 5 and is a rational number

D. [tex] \sqrt{50} [/tex] equals 7.07106781187. The number doesn't terminate and so it is irrational. 

The answer is D

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