Odpowiedzi

2009-10-03T19:56:30+02:00
2/5 y (20y-0,5) = 8y-0,2
8y = 0,2 /:8
y=0,025

: )
2009-10-03T22:12:56+02:00
2/5y (20y-0,5) =
= 8y²-2/5*1/2y=
=8y² - 1/5y