E(x)= radical(x+2)² + radical(x-5)²
a) [E(5)-5]:2=
( radical 7² +radical 0² -5):2=
( 7+0-5):2=
2:2=1
b) E(a)= |a+2|+|x-5|
a€[-2,5]
E(a)=a+2-a+5
E(a)=7 €N oricare ar fi a€[-2,5]
