Cześć!
Szczegółowe wyjaśnienie:
a)
[tex](a + b){}^{2} = a {}^{2} + 2ab + b {}^{2} [/tex]
[tex](x - 4)(x {}^{2} + 2x + 1)[/tex]
[tex]x {}^{3} + 2x { + x - 4x {}^{2} } - 8x - 4[/tex]
[tex]x {}^{3} - 2x {}^{2} - 7x - 4[/tex]
b)
[tex](a - b) { = a {}^{} }^{2} - 2ab + b {}^{2} [/tex]
[tex](2x - 3) {}^{2} (x + 2)[/tex]
[tex](4x {}^{2} - 12x + 9)(x + 2)[/tex]
[tex]4x {}^{3} + 8x {}^{2} - 12x {}^{2} - 24 + 9x + 18[/tex]
[tex]4x {}^{3} - 4x {}^{2} - 24x + 9x + 18[/tex]
[tex]4x {}^{3} - 4x {}^{2} - 15x + 18[/tex]