Ответы и объяснения

2013-02-05T11:36:29+00:00

y=-6/x

2x^2-108/x^2=-19

2x^4-108+19x^2=0

x^2=t

2t^2+19t-108=0

D=361+864=1225=35^2

t1=(-19+35)/4=4

t2=(-19-35)/4=-13.5

x^2=4                и                    x^2=-13.5 -нет решений

x1=2

x2=-2

y1=-3

y2=3