Răspuns:
Explicație pas cu pas:
d) V(3^2*3/7^2)=V(27/49)
3/9V21=1/3V21=V(21/3^2)=V(7/3)
1/9V6=V6/9^2=V6/81=V(2/27)
-6/9V15=-V(15*6^2/81)=-V15*36/81=-V15*4/9=-V(20/3)
4/9V63=V4^2*63/9^2=V16*63/81=V16*7/9=V(112/9)