Question

решите уравнение х-х2+1/х-1=х/х+1

Answer 1

х =2\х+1 х=[2+1]\x x^2=2+x x^2 -х -2 =0
D= 1+4^1^2 =9
sqrt d =з
х1=(1+3)/2=2


x2=(1-3)/2=_1