Ответ:
Краткое пояснение: Используем формулу разности квадратов (a - b)(a + b) = a² - b² и упрощаем выражения.
Задание 9: Найдите значение выражения:
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\[(\sqrt{17} - 3)(\sqrt{17} + 3) = (\sqrt{17})^2 - 3^2 = 17 - 9 = 8\]
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\[(\sqrt{23} - 2)(\sqrt{23} + 2) = (\sqrt{23})^2 - 2^2 = 23 - 4 = 19\]
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\[(\sqrt{47} - 5)(\sqrt{47} + 5) = (\sqrt{47})^2 - 5^2 = 47 - 25 = 22\]
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\[(\sqrt{29} - 4)(\sqrt{29} + 4) = (\sqrt{29})^2 - 4^2 = 29 - 16 = 13\]
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\[(\sqrt{41} - 3)(\sqrt{41} + 3) = (\sqrt{41})^2 - 3^2 = 41 - 9 = 32\]
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\[(\sqrt{13} - 2)(\sqrt{13} + 2) = (\sqrt{13})^2 - 2^2 = 13 - 4 = 9\]
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\[(\sqrt{7} - \sqrt{3})(\sqrt{7} + \sqrt{3}) = (\sqrt{7})^2 - (\sqrt{3})^2 = 7 - 3 = 4\]
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\[(\sqrt{13} - \sqrt{2})(\sqrt{13} + \sqrt{2}) = (\sqrt{13})^2 - (\sqrt{2})^2 = 13 - 2 = 11\]
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\[(\sqrt{17} - \sqrt{5})(\sqrt{17} + \sqrt{5}) = (\sqrt{17})^2 - (\sqrt{5})^2 = 17 - 5 = 12\]
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\[(\sqrt{19} - \sqrt{2})(\sqrt{19} + \sqrt{2}) = (\sqrt{19})^2 - (\sqrt{2})^2 = 19 - 2 = 17\]
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\[(\sqrt{5} - \sqrt{3})(\sqrt{5} + \sqrt{3}) = (\sqrt{5})^2 - (\sqrt{3})^2 = 5 - 3 = 2\]
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\[(\sqrt{7} - \sqrt{5})(\sqrt{7} + \sqrt{5}) = (\sqrt{7})^2 - (\sqrt{5})^2 = 7 - 5 = 2\]
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\[(\sqrt{19} - 7)^2 + 14\sqrt{19} = (\sqrt{19})^2 - 2 \cdot 7 \cdot \sqrt{19} + 7^2 + 14\sqrt{19} = 19 - 14\sqrt{19} + 49 + 14\sqrt{19} = 19 + 49 = 68\]
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\[(\sqrt{13} - 3)^2 + 6\sqrt{13} = (\sqrt{13})^2 - 2 \cdot 3 \cdot \sqrt{13} + 3^2 + 6\sqrt{13} = 13 - 6\sqrt{13} + 9 + 6\sqrt{13} = 13 + 9 = 22\]
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\[(\sqrt{11} - \sqrt{7})^2 + 14\sqrt{11} = (\sqrt{11})^2 - 2 \cdot \sqrt{11} \cdot \sqrt{7} + (\sqrt{7})^2 + 14\sqrt{11} = 11 - 2\sqrt{77} + 7 + 14\sqrt{11} = 18 - 2\sqrt{77} + 14\sqrt{11}\]
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\[(\sqrt{5} + 9)^2 - 18\sqrt{5} = (\sqrt{5})^2 + 2 \cdot 9 \cdot \sqrt{5} + 9^2 - 18\sqrt{5} = 5 + 18\sqrt{5} + 81 - 18\sqrt{5} = 5 + 81 = 86\]
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\[(\sqrt{17} + 2)^2 - 4\sqrt{17} = (\sqrt{17})^2 + 2 \cdot 2 \cdot \sqrt{17} + 2^2 - 4\sqrt{17} = 17 + 4\sqrt{17} + 4 - 4\sqrt{17} = 17 + 4 = 21\]
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\[(\sqrt{3} + 8)^2 - 16\sqrt{3} = (\sqrt{3})^2 + 2 \cdot 8 \cdot \sqrt{3} + 8^2 - 16\sqrt{3} = 3 + 16\sqrt{3} + 64 - 16\sqrt{3} = 3 + 64 = 67\]
Ответ: 1) 8, 2) 19, 3) 22, 4) 13, 5) 32, 6) 9, 7) 4, 8) 11, 9) 12, 10) 17, 11) 2, 12) 2, 13) 68, 14) 22, 15) 18 - 2\sqrt{77} + 14\sqrt{11}, 16) 86, 17) 21, 18) 67