Ôn lại chủ đề công thức nghiệm

Flashcard
•
Mathematics
•
9th Grade
•
Hard
Wayground Content
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8 questions
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1.
FLASHCARD QUESTION
Front
Phương trình bậc hai: x² - 3x = 0 có hệ số?
Back
a= 1, b= -3, c= 0
2.
FLASHCARD QUESTION
Front
Phương trình bậc hai: x² - 9 = 0
Back
x = ±3
3.
FLASHCARD QUESTION
Front
Em hãy điền vào dấu ba chấm: \(\Delta = b^2 - ...\)
Back
4ac
4.
FLASHCARD QUESTION
Front
Để phương trình bậc hai có nghiệm kép thì:
Back
\Delta = 0
5.
FLASHCARD QUESTION
Front
Nghiệm kép của phương trình bậc hai:
Back
6.
FLASHCARD QUESTION
Front
Phương trình bậc hai có hai nghiệm phân biệt khi nào?
Back
\Delta > 0
7.
FLASHCARD QUESTION
Front
Δ > 0, phương trình bậc hai có 2 nghiệm phân biệt:
Back
x_1 = \frac{-b - \sqrt{\Delta}}{2a}; x_2 = \frac{-b + \sqrt{\Delta}}{2a}
8.
FLASHCARD QUESTION
Front
Nghiệm của phương trình: 1995x² - 1996x + 1 = 0?
Back
x₁=1; x₂=\frac{1}{1995}
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