Question

Срочно!!!! Помогите!! ​

Answer 1

Ответ:

УДАЧИ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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