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Descompuneti in factori.... a)x(3-y)+5(y-3)................b)2,5a(a-1)-(1-a)

Răspuns :

Xx3-XxY+5Y-5x3         b 2,5AxA-2,5x1-(1-a) sper ca e bine...noi asa am fi facut la scoala :*