Question

Va rog: K+1 ori K(K+1)

Answer 1

$k+1*k(k+1)=k+1* k^{2} +k=k+ k^{2} +k= k^{2} +2k$

Answer 2

K+1×k la a 2 + k
k la 3 + k la 2+ k la 2 + k
k la a 3 + 2×k la 2 +k