Odpowiedzi

2009-12-18T08:02:13+01:00
1/x - (2x-7)/(x+2) = 4 x!= 0 i x!=-2
(x+2)/x - 2x + 7 = 4x
x+2 - 2x^2 + 7x = 4x^2
6x^2 -8x - 2 = 0

delta = 64 - 4*(-2)*6 = 112
pierw z delty = 4 pierw z 7

x1 = 8 - 4 pierw z 7 / 12 = (2-pierw z 7) / 3
x2 = 8 + 4 pierw z 7 / 12 = (2+pierw z 7) /2