(1) a) √(784/1225)=28/35=4/5
b) √[(1/6)⁴ x 81/625]=1/6² x9/25=1/4x1/25=1/100
ex 2) Sa se calculeze sumele
a) √8 + √18 + √32 - √200 =
=2√2 + 3√2 + 4√2 -10√2 =
=9√2 -10√2 =
=-√2
ex3 Sa se efectueze
a) (6 +√6)(3√2 + 4√3)(√3-√2)=
=(6 +√6)(3√6 +12-6-4√6)=
=(6 +√6)(6-√6)=
=36-6=30