Odpowiedzi

2009-12-02T14:49:04+01:00
A) (x2+2x)2-x2=0
4x + 4x - 2x = 0
6x = 0 /:6
x = 0

b) x3+x-2=0
4x - 2 = 0 /+2
4x = 2
x = 1/2

c) x5+4x3-x2-4=0
15x - 4 = 0
15x = 4
x = 15/4 = 3,75
2009-12-02T14:53:42+01:00
A) (x2+2x)2-x2=0
4x+4x-2x=0
8x-2x=0
6x=0 /:6
x=0

b) x3+x-2=0
4x=2 /:4
x=0,5

c) x5+4x3-x2-4=0
5x+4x-2x=-4+4
9x-2x=0
7x=0 /:7
x=0