Question

si: B={-1;0;1} calcula n(B^2)​

Answer 1

a+b)n=an+nan-1b+n(n-1)2an-2b2+…+n!k!(n-k)!an-kbk+…+bn

(a-b)n=an-nan-1b+n(n-1)2an-2b2+…+(-1)kn!k!(n-k)!an-kbk+…+(-1)nbn