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b) (3x - 4)(2x - 5x + 2) - (2x - 3)(x - x + 9);
URGENT DAU COROANA​


Răspuns :

[tex](3x - 4)( - 3x + 2) - (2x - 3) \times 9 = - 9 {x}^{2} + 6x + 12x - 8 - (18x - 27) = - 9 {x}^{2} + 19[/tex]