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2014-09-17T16:16:58+03:00
(a-b)³=a³-3a²b+3ab²-b³

Folosind formula ⇒(y/2-4z)³=y³/8-3·y²/4·4z+3·y/2·16z²-64z³
                                            =y³/8-3y²z+24yz²-64z³  .....