Răspuns:
C
Explicație pas cu pas:
[tex] - \sqrt{ \frac{5}{4} } = - \frac{ \sqrt{5} }{2} [/tex]
A.
√36/25 = 6/5 rational
B.
-√4/9 = -2/3 rational
C.
-√1,25 = -√125/100 = -√5/4 = -√5/2 irational
D.
√49/36 = 7/6 rational
