mg= radical din x*y
a) 5=radical 5*x
Ridicam totul la patrat:
25 = 5*x ==> x=5
b) 6 = radical 9*x
36 = 9* x ==> x =4
c) 8 = radical (x*31/5)
64 = x* 31/5 ==> x = 320/31
d) 3,(6) = radical (x*1,8(3))
3,(6) = (36-3)/9=33/9
1,8(3) = (183-1)/90= 182/90
(33/9)^2 = x* (182/90)^2 ==> x= 108900/33124 = 27225/8281