Найдите значение выражения x − y, если 24² + 7² = y² и 20² + x² = y².

  1. 10
  2. -15
  3. 15
  4. -10

📝 Detailed explanation

Из первого равенства находим y²: y² = 576 + 49 = 625 ⇒ y = 25. Подставим во второе равенство: 20² + x² = 625 ⇒ 400 + x² = 625 ⇒ x² = 225 ⇒ x = 15. Их разность: x − y = 15 − 25 = −10.
2 / 10 (20%)
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