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(3a+2x)³=va rog ajutatima 

Răspuns :


folosim regula (a+b)³=a³+3a²v+3ab²+b³
(3a+2x)³=27a³+3·9a²·2x+3·3a·4x²+8x³=27a³+54a²x+36ax²+8x³