Question

Sa se Aduca la forma cea mai simpla

Answer 1

La prima amplifici cu 7 - 4 radical 3 iar la a doua amplifici cu 7 +4 radical 3 .... Apoi vei avea 7 - 4 radical 3 + 7 + 4 radical 3 (totul supra ) / 49 - 12 ... => 14 / 37

Answer 2

rationalizam
1/(7+4√3)=(7-4√3)/[(7+4√3)(7-4√3)=(7-4√3)/(7-48)=(7-4√3)/-41=(4√3-7)/41
1/(7-4√3)=(7+4√3)/(7-48)=(7+4√3)-41=(-7-4√3)/41
1/(7+4√3)+1/(7-4√3)=(4√3-7)/41+(-7-4√3)/41=(4√3-7-7-4√3)/41=-14/41=-0,(34146)