1x1=(1+√3)/2 x2=(1-√3)/2p=-(x1+x2)p=-[(1+√3)/2+(1-√3)/2=-(1+√3+1-√3)/2=-2/2=-1q=x1*x2q=(1+√3)/2*(1-√3)/2=(1-3)/4=-2/4=-1/2x²-x-0,5=0Ответ А21/2*(x+4):2(x+1)(x+4)=(x+4)/2*1/[2(x+1)(x+4)]=1/[4(x+1)]Ответ C31)a/(a+1)+1=(2a+1)/(a+1)2)1-3a²/(1-a²)=(1-4a²)/(1-a²)3)(2a+1)/(a+1)*([(1-a)(1+a)]/[(1-2a)(1+2a)]=(1-a)/(1-2a)Ответ Е