Odpowiedzi

2010-04-14T16:58:09+02:00
A)x=1, y=2
5x-2y=5*1-2*2=5-4=1

b)x=2, y=-1
5x-2y=5*2-2*1=10-2=8

c)x=½, y=-1¼=5/4
5x-2y=5*1/2-2*5/4=5/2-5/2=0

d)x=-0,2, y=1,5
5x-2y=5*(-0,2)-2*1,5=-1-3=-4
2 5 2
2010-04-14T16:59:35+02:00
5x-2y
a)x=1, y=2
5*1-2*2=1
b)x=2, y=-1
5*2-2*-1=12
c)x=½, y=-1¼
5*½-2*-1¼=0
d)x=-0,2, y=1,5
5*-0,2-2*1,5=-1-3=-4
mam nadzieje ze pomoglam ;)
3 4 3
2010-04-14T17:02:30+02:00
A)podstawiamy 5*1-2*2=5-4=1
b)5*2-2-(-1)=10+3=13
c)5*1/2-2*1 1/4=2,5-2,5=0
d)5*-0,2-2*1,5=-1-3=4


1 5 1