1.conducting experiments 2.develop skill II 3.with pleasure to do science
1.conducting experiments 2.develop skill II 3.with pleasure to do science 4.find out what's new in
1.conducting experiments 2.develop skill II 3.with pleasure to do science 4.find out what's new in 5. hold events
1.conducting experiments 2.develop skill II 3.with pleasure to do science 4.find out what's new in 5. hold events 6. Take a broad look at
1.conducting experiments 2.develop skill II 3.with pleasure to do science 4.find out what's new in 5. hold events 6. Take a broad look at 7.sharing talent
1.conducting experiments
1.conducting experiments 2.develop skill II
1.conducting experiments 2.develop skill II 3.with pleasure to do science
1.conducting experiments 2.develop skill II 3.with pleasure to do science 4.find out what's new in
1.conducting experiments 2.develop skill II 3.with pleasure to do science 4.find out what's new in 5. hold events
1.conducting experiments 2.develop skill II 3.with pleasure to do science 4.find out what's new in 5. hold events 6. Take a broad look at
1.conducting experiments 2.develop skill II 3.with pleasure to do science 4.find out what's new in 5. hold events 6. Take a broad look at 7.sharing talent
8.Speaking in public
8.Speaking in public 9.take a step forward
Б) больше 25
Объяснение:
x + √x = 42
ОДЗ : x ≥ 0
оставим √x в левой части,x перенесём в правую
√x = 42 - x
теперь возведём всё в квадрат
(√x)^2 = (42 - x)^2
x = 1764 - 84x + x^2
переносим всё в левую часть
x - 1764 + 84x - x^2 = 0
приводим подобные члены
-x^2 + 85x - 1764 = 0
для удобства домножим всё на -1
x^2 - 85x + 1764 = 0
D = (-85)^2 - 4 * 1 * 1764 = 7225 - 7056 = 169 (13)
x1 = (85 + 13)/2 = 98/2 = 49
x2 = (85 - 13)/2 = 72/2 = 36
Подставляем первое значение
49 + √49 = 49 + 7 = 56 - не подходит
Подставляем второе значение
36 + √36 = 36 + 6 = 42 - подходит.
Значит наш корень 36.
Он не равен 0,не меньше 13 и не больше 40,получается правильный вариант под Б) больше 25