Odpowiedzi

2010-03-02T20:33:41+01:00
2010-03-02T20:37:38+01:00
X-y=12
xy=x2+4

y=x-12
x(x-12)=x2+4

y=x-12
x2-12x-x2=4

y=x-12
x=-1/3

y=-1/3-12
x=-1/3

y=-12 1/3
x=-1/3