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Cat ne da?
(2k+3 )k (k+1)?????


Răspuns :

(2k+3)k(k+1) = (2k^2+3k)(k+1) = 2k^3 + 5k^2 + 3k
=(2k+3 )k (k+1)
=2k³+2k²+3k²+3k
=2k³+5k²+3k