Предмет: Математика, автор: nastab771

ПОМОГИТЕ ,, КАК РЕШИТЬ

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Автор ответа: GreatFilter

2

$3-7\sqrt{2} -7(9-\sqrt{2})=\\=3-7\sqrt{2} -7*9-7*(-\sqrt{2} )\\ =3-7\sqrt{2} -63+7\sqrt{2}=\\ =3-63=-60\\ \\$

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