решите уравнение х^2/x+3=2x+3/x+3
2x/x+6 - 144/x^2-36=1

1) x^2/(x+3) -(2x+3)/(x+3)=0(x^2-2x-3)/(x+3)=0x^2-2x-3=0D=4+12=16=4^2x1=(2+4)/2=6x2=(2-4)/2= -12) 2x(x-6)-144)/(x-6)(x+6)=12x^2-12x-144=x^2-362x^2-12x-144-x^2+36=0x^2-12x-108=0D=144+432=576=24^2x1=(12+24)/2=18x2=(12-24)/2= -6