Odpowiedzi

Najlepsza Odpowiedź!
2010-01-27T22:08:13+01:00
X²yz - (xy²z - (xyz² - (x²yz - xy²z))) =
= x²yz - (xy²z - (xyz² - x²yz + xy²z)) =
= x²yz - (xy²z - xyz² + x²yz - xy²z)=
= x²yz - xy²z + xyz² - x²yz + xy²z =
xyz²