ACC A2 Unit 4 Test Review

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What does the discriminant of a quadratic equation indicate?

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The discriminant indicates the nature of the roots of a quadratic equation. If it is positive, there are two distinct real roots; if it is zero, there is one real root (a repeated root); if it is negative, there are two complex roots.

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What is the quadratic formula?

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What does it mean if the discriminant is negative?

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If the discriminant is negative, it means that the quadratic equation has two complex (imaginary) roots.

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How do you solve a quadratic equation by factoring?

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What is the square root method for solving equations?

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The square root method involves isolating the variable term and then taking the square root of both sides of the equation to solve for the variable.

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What is the first step in using the quadratic formula?

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What is the significance of a positive perfect square discriminant?

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A positive perfect square discriminant indicates that the quadratic equation has two distinct rational roots.

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What is the significance of a zero discriminant?

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A zero discriminant indicates that the quadratic equation has exactly one real root, which is a repeated root.

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