a)
(2x-1)(2x+1) =/ 0
2x-1=/0 i 2x+1 =/ 0
x=/ 1/2 i x=/-1/2
(1-4x^2) / (2x-1)(2x+1) = -1
1-4x^2 = -(2x-1)(2x+1)
1-4x^2 = -(4x^2 - 1)
1-4x^2 = -4x^2 + 1
0=0
rownanie tozsamosciowe
x nalezy do: R - {-1/2, 1/2}
b)
x + 4 =/ 0
x =/ -4
(16-x^2) / (4+x) = 4-x
16 - x^2 = (4-x)(4+x)
16-x^2 = 16-x^2
0=0
rowanie rozsamosciowe
x nalezy do: R -{-4}
