Предмет: Математика, автор: billie007

Срочно!!!! Помогите!!

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Автор ответа: fruktikfruktik

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УДАЧИ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

$17 {}^{2} = (20 - 3) {}^{2} = 20 {}^{2} - 2 \times 20 \times 3 + 3 {}^{2} = 400 - 120 + 9 = 200 + 9 = 289$

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