Ответ:
2/3-(-1/3)²=2/3-1/9=5/9
2/3-(-2/9)²=2/3-4/81=50/81
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Ответ:
2/3-(-1/3)²=2/3-1/9=5/9
2/3-(-2/9)²=2/3-4/81=50/81