Odpowiedzi

2009-12-16T00:11:09+01:00
(1/4)( 8x -2)² - 4(2x -2) = 13 + 4x(5 + 4x)
(1/4)( 64 x² -32x +4) - 8x +8 = 13 + 20x + 16 x²
16 x² - 8x + 1 - 8x + 8 = 13 + 20x + 16x²
-16x +9 = 20x + 13
36 x = 9 - 13 = -4
x = -4/36
x = - 1/9