Odpowiedzi

2010-03-08T16:47:52+01:00
A) 4x = 20 /2
2x = 10
b)(x-5)(x+5)=0
x^2 - 25 = 0
x^2 = 25
d)2x = 5x - 3x
2x = 2x /:4
0,5x = 2x/4
0,5x = x/2
25 4 25