Odpowiedzi

2010-02-22T22:09:32+01:00
X+y=5
x*y=-6

x=5-y
5-y*y=-6

x=5-y
y(5-y)=-6

x=5-y
5y-y=-6

x=5-y
4y=-6/4

y=1.5
x=3.5