Răspunsuri

2014-09-20T23:02:27+03:00
X+(x-1)=19+(x+1)=> 2x-1=x+20=> x=21
(x-1)*x*(x+1)=20*21*22=9240
2014-09-20T23:05:55+03:00
Pai iti da numarul dar 9240 cred