Quadratic Equations

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1/15 cards
What is a quadratic equation?
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A quadratic equation is a polynomial equation of degree 2, typically in the form ax^2 + bx + c = 0, where a, b, and c are constants and a ≠ 0.
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What is the standard form of a quadratic equation?
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The standard form of a quadratic equation is ax^2 + bx + c = 0.
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What does 'a' represent in a quadratic equation?
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In a quadratic equation, 'a' is the coefficient of x^2 and it determines the parabola's direction (upwards if a > 0, downwards if a < 0).
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How do you find the solutions to a quadratic equation?
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Solutions can be found using the quadratic formula, factoring, or completing the square.
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What is the quadratic formula?
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The quadratic formula is x = (-b ± √(b^2 - 4ac)) / (2a).
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What does the discriminant in a quadratic equation tell us?
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The discriminant (b^2 - 4ac) indicates the nature of solutions: if positive, two real solutions; if zero, one real solution; if negative, no real solution.
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When is a quadratic equation considered to be in vertex form?
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A quadratic equation is in vertex form when it is written as y = a(x-h)^2 + k, where (h, k) is the vertex.
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What is the role of the coefficient 'b' in the quadratic equation?
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The coefficient 'b' affects the position and direction of the graph, impacting the axis of symmetry and vertex.
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What is factoring in terms of solving quadratic equations?
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Factoring involves expressing the quadratic equation as a product of binomial expressions, used to find its solutions.
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How do you complete the square for a quadratic equation?
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Completing the square involves rewriting the quadratic in the form (x + p)^2 = q, enabling easier solving.
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What is the axis of symmetry in a quadratic equation?
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The axis of symmetry of a quadratic function is the vertical line x = -b/(2a).
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What is a real-world example of a quadratic relationship?
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Projectile motion, where the trajectory of an object can be described by a quadratic equation.
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What shapes do the graphs of quadratic equations form?
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The graphs of quadratic equations are parabolas.
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Can quadratic equations have complex solutions?
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Yes, if the discriminant is negative, the solutions are complex (not real).
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What determines the width of the parabola in a quadratic equation?
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The value of 'a' affects the width; larger absolute values of 'a' make the parabola narrower, smaller values make it wider.
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