Предмет: Алгебра, автор: Artur1252

Визнач, при якому додатному значенні параметра р квадратне рівняння 4х²+ px +9=0 має один корінь.

Ответы

Автор ответа: 7x8
6

Ответ:

12

Объяснение:

4x^2+px+9=0\\\\D=p^2-4\cdot4\cdot9=p^2-144

має один корінь

D=0\\\\p^2-144=0\\\\(p+12)(p-12)=0\\\\p+12=0\ \ \ \ \ \ \ \ \ \ p-12=0\\\\p=-12 < 0\ \ \ \ \ \ \ \ p=12


Artur1252: Благодарю, сударь.
7x8: не за что :)
7x8: обновите страницу
7x8: будет только 12
Автор ответа: iramazurk
4

Ответ:

р = 12

Объяснение:

Уравнение имеет 1 корень, если дискриминант равен нулю.

4х² + рх + 9 = 0

а = 4; в = р; с = 9

Д = в² - 4ас

Д = р² - 4 * 4 * 9 = р² - 144

р² - 144 = 0

р² = 144

р1 = -12

р2 = 12

Положительное значение, это значение которое больше нуля.

12 > 0, значит: при р = 12, квадратное уравнение имеет 1 корень


7x8: При р = - 12, квадратное уравнение также имеет 1 корень
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