Odpowiedzi

2009-11-12T19:50:41+01:00
(2n)²+(2n+2)²+(2n+4)²=
4n²+4n²+8n+4+4n²+16n+16=
12n²+24n+20
Pozdrawiam:)
1 4 1
2009-11-12T19:51:04+01:00
2009-11-12T19:50:50+01:00