x=2/(1-√3)=2(1+√3)/[(1+√3)(1-√3)]=2(1+√3)/(1²-√3²)=2(1+√3)/(1-3)=2(1+√3)/(-2)=-1-√3 x²+2x+1=(x+1)²=(-1-√3+1)²=(-√3)²=3
