Question

Va rog urgent !!
Ex :1, 2, 3, 4.

Answer 1

$\sqrt{1,96}$ - $\sqrt{2 \frac{1}{4} }$=$\sqrt{1 \frac{96}{100} }$ -$\sqrt{ \frac{9}{4} }$=$\frac{14}{10}$-$\frac{3}{2}$=$\frac{14}{10}$-$\frac{15}{10}$=-$\frac{1}{10}$
2)a=3rad7 b=6rad2
a=3*3*7=63
b=6*6*2=72
a<b
3)rad8-(rad128-rad50)=xrad2
2rad2-(8rad2-5rad2)=xrad2
2rad2-3rad2=xrad2
-1rad2=xrad2
x=$\frac{-1 \sqrt{2} }{ \sqrt{2} }$       (Rationalizezi)
x=$\frac{-1 \sqrt{4} }{ 2} }$
x=$\frac{-1*2}{2}$
x=-1
4)$\frac{2 \sqrt{2} }{x} =[tex] \frac{ \sqrt24}{5 \sqrt{3} } }$=
x=${ \frac{2 \sqrt{2}*5 \sqrt{3} }{ \sqrt{24} } }$
x=$\frac{2 \sqrt{2}*5 \sqrt{3} }{2 \sqrt{6} }$
x=$\frac{10}{2}$
x=5