What determines if a quadratic function opens upward or downward?
Module 4 Review

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Mathematics
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University
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Hard
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1.
FLASHCARD QUESTION
Front
Back
The sign of the coefficient 'a' in the quadratic term ax^2. If 'a' is positive, the parabola opens upward; if 'a' is negative, it opens downward.
2.
FLASHCARD QUESTION
Front
Are the terms solution, root, x-intercept, and zero interchangeable in the context of quadratic equations?
Back
True, they all refer to the values of x where the quadratic function equals zero.
3.
FLASHCARD QUESTION
Front
What is the first step in solving a quadratic equation by completing the square?
Back
Move the constant term to the other side of the equation.
4.
FLASHCARD QUESTION
Front
What does the expression -3i(4 + 2i) simplify to?
Back
6 - 12i.
5.
FLASHCARD QUESTION
Front
How do you complete the square for the expression x^2 + 12x + ____?
Back
Add 36 to complete the square, resulting in x^2 + 12x + 36.
6.
FLASHCARD QUESTION
Front
What is the standard form of a quadratic function?
Back
y = ax^2 + bx + c.
7.
FLASHCARD QUESTION
Front
What is the vertex of a parabola given by the quadratic function y = ax^2 + bx + c?
Back
The vertex can be found using the formula (-b/(2a), f(-b/(2a))).
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