Odpowiedzi

2009-11-05T15:04:40+01:00
A) (×-3)(×+3)+5×=×(×-2)
x² - 9 + 5x = x² - 2x
5x +2x = 9
7x = 9/ :7
x = 9/7

b) (y-1)²>y(×+4)-3y
y²-2y+1 > yx +4y -3y
y² - 2y +1 > yx