Odpowiedź:
9a² - 3a = 9 * (- 1/3)² - 3 * (- 1/3) = 9 * 1/9 + 1 = 1 + 1 = 2
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Odpowiedź:
9a² - 3a = 9 * (- 1/3)² - 3 * (- 1/3) = 9 * 1/9 + 1 = 1 + 1 = 2