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(2/rad10+1/rad5-1/rad2): 2/rad2=
(VA ROG FRUMOS )​


Răspuns :

(2/rad10+rad2/rad10-rad5/rad10)×rad2/2=

(2+rad2+rad5)/rad10 ×rad2/2=

(2+rad2+rad5/)2rad5=

(2rad5+rad10+5)/10