Răspunsuri

2014-05-15T09:51:31+03:00
6/rd3-1=6rd3-6/3-1    =  6rd3-6/2  =  3rd3-6
undeva ai gresit
stiu si unde. Tu rationalizezi cu r3+1, ca sa ai la numitor 3-1. Adta inseamna ca la numarator vei avea 6r3+6
2014-05-15T09:59:13+03:00
6/ r3-1 - rationalizam cu r3+1
6(r3+1)/3-1=
6(r3+1)/2=
3(r3+1)=
3r3+3