a)Se rationalizeaza numitorul, inmultind cu conjugata √3-2 (x+1)(√3-2)/(√3+2)(√3-2) + √3 = 2-x (x+1)(√3-2)/(3-2) + √3 = 2-x (x+1)(√3-2)+√3=2-x x√3-2x+√3-2+√3-2+x=0 x√3-x+2√3-4=0 x(√3-1)=4-2√3 x=2(2-√3)/(√3-1) x=2(2-√3)(√3+1)/2 x=(2-√3)(√3+1) x=2√3+2-3-√3 x=√3-1