Odpowiedzi

2010-01-18T18:15:29+01:00
1.

a) 1 - 2x^2 = 5 + x^2
x^2 = 5 - 1
x = 2

b) 12 - 3x^2 = 0
3x * x = -12
x = 2

c) 6x^2 = 8 - x^2
7x^2 = 8
x = 8/7 (pod pierwiastkiem all)

2.

a)x^2 - 2x = 0
x = 0

b) 3x^2 + 8x = 0
x = 0

c) 4x^2 - x/2 = 0
x =0