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18. Efectuați calculele: a) (x + 2)(x²-x + 3) − (x + 1)(x² + 2x - 5); b) (2x + 1)(x² - 2x + 4)-(x-3)(2x²+x+3); c) (x − 3)(x² − 3x + 2) - (x+3)(x² - 2x + 3); d) (2x − 1)(-x²+x-2) + (2x − 3)(x²-x + 1).​

18 Efectuați Calculele A X 2xx 3 X 1x 2x 5 B 2x 1x 2x 4x32xx3 C X 3x 3x 2 X3x 2x 3 D 2x 1xx2 2x 3xx 1 class=