a) Nie
[tex] {x}^{3} = - 1 \\ = \sqrt[3]{ - 1} \\ x = - 1[/tex]
b) Tak
[tex] - 4x = 0 \\ x = 0[/tex]
c) Nie
[tex]3 + {x}^{2} = 19 \\ {x}^{2} = 16 \\ x = \sqrt{16} = 4[/tex]
d) Nie
[tex] {x}^{3} - 64 = 0 \\ {x}^{3} = 64 \\x = \sqrt[3]{64} = 4[/tex]
e) Nie
[tex] {x}^{3} + 8 = 0 \\ {x}^{3} = - 8 \\ x = \sqrt[3]{ -8 } = - 2[/tex]
