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Aratatti ca numarul a=[2supra5√3-1supra√12+3supra√75]x√27
Mersii


Răspuns :

a=[2/5√3-1/√12+3/√75]x√27 =
=[2/5√3-1/2√3+3/5√3]x3√3 =
=6/5-3/2+9/5 =
=15/5-3/2=
=3-3/2=
=(6-3)/2=3/2